Humans

By Sam Wong

OksanaKiian/Getty ImagesFOR many of us, food has been one of the most dependable pleasures in a year when so many normal activities have been put on hold. It seems particularly cruel that a common, lingering symptom of covid-19 is an altered sense of taste and smell, with studies finding that between 40 and 85 per cent of people with the illness experience some loss of these senses.
The virus that causes covid-19 attaches to ACE2 proteins in the olfactory epithelium, the tissue inside the nose where our smell receptors are located. Once the virus enters these cells, … More

By Jacob Aron

ZA/UM
Disco Elysium
ZA/UM
PC, PlayStation 4 and 5, Xbox One, Series X and S

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YOU wake up, unable to remember anything about your life or how you got here. This is the opening of so many video games that an amnesiac protagonist has become something of a cliché.
But Robert Kurvitz, lead writer and designer of Disco Elysium prefers to see it as an essential part of video game storytelling. “There’s a promise of newness and being someone else, and for that the player needs to forget who they were,” he told me when we spoke after the game’s recent console release.
To be fair, Disco Elysium doesn’t quite start with waking up. The game’s first words are uttered by your ancient reptilian brain, which you engage in a conversation about whether to become conscious. Soon, your limbic system joins the exchange as you become increasingly aware of your surroundings, before waking up half-naked and hung-over. It is a unique and arresting beginning.
Stumbling out of your hotel room and speaking to the people you meet, it becomes apparent that you are a police detective trying to solve a murder, and you have been on a three-day bender, leading to complete memory loss.
Like many role-playing games, your character has a number of skills that determine your ability to perform tasks or unlock dialogue options. But while a traditional fantasy RPG might rate you for strength or magic, Disco Elysium‘s skills are more unusual – what’s more, they talk.
Your Encyclopaedia skill, for example, might feed you bits of information about the vaguely Eastern European setting of the game, while Composure helps you read other people’s body language and Electrochemistry pushes you towards indulging in alcohol and other addictive substances.
Kurvitz says the team wanted to avoid presenting the skill characters as the kind of intrusive voices that might be experienced by someone with, say, dissociative identity disorder. The skills are clearly facets of one personality rather than a mental cacophony. The team wanted to simulate the way the mind works through internal monologue, says Kurvitz.
This means that while the basic plot is about solving a murder, the game’s real concern is the construction of identity. When playing, you gain points you can invest in skills, boosting the chances of success when you use them and further moulding your personality. Increase your Drama skill and you will find it easier to be inventive and spot when people are lying; boost it too high and you could become overly dramatic.
In addition to the skills, certain characters or experiences you come across in the game can trigger thoughts that you can choose to engage with and internalise. I found myself going for dialogue options dealing with art or creativity, which resulted in my Conceptualisation skill offering me the chance to be an “art cop”.
The result is you can make some really strange choices about how your detective behaves, sending you deeper into Disco Elysium‘s weird world. I have been taking full advantage, but Kurvitz says it has proved surprisingly difficult to get players to embrace these options.
To nudge people towards more interesting role playing, a message on the loading screen reassures you that making odd choices won’t mean you fail in the game.
Perhaps the lesson is that when we are invited to reinvent ourselves, we tend to stick to the familiar.
Jacob also recommends…
Planescape: Torment
Black Isle Studios
PC, PlayStation 4, Xbox One, Nintendo Switch, Android, iOS
This cult classic role-playing game, also starring an amnesiac protagonist, is set across a strange fantasy multiverse and was a big inspiration for Disco Elysium.

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Shana Besson/Netflix
Watch
Oxygen, Alexandre Aja’s sci-fi thriller, is the story of a woman with amnesia (Mélanie Laurent) who is trapped in a cryogenic chamber. Her oxygen is running out and she will survive only if she remembers who she is. On Netflix from 12 May.

Read
Crooked Cats tell their own bloody tales in anthropologist Nayanika Mathur’s study of how big cats – tigers, leopards and lions – come to prey on humans. Ecological collapse is an important reason why such attacks occur, but is it the whole story?
Pushkin House
Last chance
Cosmos: Reverse perspective looks at Earth from space through collages and graphics, capturing the changes we have lived through since Yuri Gagarin’s first orbit. Online from Pushkin House until 18 May. More

By Alison George

This partial skeleton (left) and skull were discovered in a cave in KenyaMartinón-Torres, et al., 2021
The oldest known burial in Africa is of a 3-year-old child who died around 78,000 years ago. The discovery sheds light on how people in the region cared for their dead at that time.
In 2017, archaeologists uncovered the top of a bundle of bones in a cave in Kenya called Panga ya Saidi. The remains were so fragile that a block of sediment around the bones was extracted intact and sent to the National Research Centre on Human Evolution (CENIEH) in Spain, where a painstaking forensic investigation took place.

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“We didn’t know until a year later what was really going on in there,” says María Martinón-Torres at CENIEH. “Unexpectedly, that sediment block was holding the body of a child.”
The researchers named the child Mtoto, which means “child” in Swahili, and estimate that they lived around 78,300 years ago, making this the oldest deliberate burial found in Africa. “It was a child and someone gave it a farewell,” says Martinón-Torres.

Analysis of the sediment surrounding the remains revealed that the child had been placed in a deliberately excavated pit and covered with sediment from the cave floor. They had been placed on their side with their legs drawn up to their chest. As the body decayed, most of Mtoto’s bones stayed in position with the exception of a few key ones.
The collarbone and top two ribs were displaced in a way typical of a body tightly bound in a shroud. And Mtoto’s head had the characteristic tilt of a corpse whose head was placed on a cushion. This points to a deliberate burial, something that is often difficult to prove from archaeological remains.
“From these little pieces of bone that were preserved, the work that we have done has allowed us to reconstruct the human behaviour surrounding the moment the body was put in the pit,” says Francesco d’Errico at the University of Bordeaux, France.

“The authors did a fantastic job in making the case that this is a deliberate burial. They have raised the bar and, in my opinion, actually set the standard on what should be done, scientifically, to demonstrate deliberate burial,” says Eleanor Scerri at the Max Planck Institute for the Science of Human History in Germany, who wasn’t involved with the research.
The discovery of any ancient human remains in Africa is big news in itself. “Human fossils are rare everywhere in Africa. We have huge temporal and spatial gaps, so this discovery is extremely important,” says Scerri..
Mtoto’s burial took place in the Middle Stone Age, which spans from roughly 300,000 to 30,000 years ago, when a suite of modern human innovations developed in Africa. Early evidence of burials in Africa is rare. No buried adults have been found from this period, although the burial of an infant in Border cave in South Africa dates to around 74,000 years ago, and the burial of a child who was about 9 years old in Taramsa Hill, Egypt, dates to around 69,000 years ago.
“I find it very interesting that we have interments of two or three children in Africa dating to around the same period,” says Paul Pettitt of the University of Durham, UK. “Mtoto’s burial is an exceptionally early example of a very rare treatment of the dead which might be commonplace in the modern world, but during the early prehistory of our species was rare, exceptional and probably marked odd deaths.”
This lack of burials shows the mortuary practices of modern humans in Africa differed from those of Neanderthals and modern humans in Eurasia, who, from about 120,000 years ago, commonly buried their dead. “That is a quite a paradox,” says d’Errico. “In Africa, where we have the origin of symbolic behaviour in the form of beads and abstract engravings, these modern humans wait quite long to make primary burials.”
Journal reference: Nature, DOI: 10.1038/s41586-021-03457-8
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Having good metacognition – the ability to think about our own thoughts – is key to success in many aspects of life. Fortunately, there are things we can all do to get to know ourselves better

Humans

5 May 2021

By Stephen Fleming

Jasu Hu
AS YOUR eyes skip across the words on this page, it is likely that you are not only reading, but also thinking about yourself reading. Are the words clear? Can you concentrate? Do you have time to read this article now or are you feeling rushed?
Psychologists have a term for this kind of awareness of our own minds: metacognition – literally, the ability to think about our own thinking. Being able to turn our thoughts on ourselves is a defining feature of being human. But we often overlook the power it has in shaping our lives, both for good and ill. The importance of good self-awareness can seem less obvious than, say, the ability to make mathematical calculations, or remember facts. Instead, for most of us, metacognition is like the conductor of an orchestra, occasionally intervening to nudge the players in the right (or wrong) direction.
Now, research from my lab and others is pulling back the veil on self-awareness, giving us a new-found respect for the power of the reflective mind. We have found ways to measure it, and can even watch it in action using brain scanners. What we have discovered is already suggesting a rethink in our understanding of conditions like dementia, but it has implications for us all. Boosting self-awareness can improve our decisions, open our eyes to fake news and help us think clearly under pressure. Just as a good conductor can make the difference between a routine rehearsal and a world-class performance, the subtle influence of metacognition can make the difference between failure and success in many aspects of life.
We rely … More

By Karina Shah

The hull of the Mary RoseHufton + Crow
When the Tudor warship the Mary Rose sank off the south coast of England in 1545, it may have taken an international crew with it. An analysis of the remains of eight mariners from the vessel suggests that some may have come from as far away as North Africa.
The Mary Rose served King Henry VIII for 34 years, before sinking during the Battle of the Solent against France. The ship, including the remains of its drowned crew, was raised from the seafloor in 1982 near the Isle of Wight in one of the most complex salvage projects in history.

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Jessica Scorrer at Cardiff University, UK, and her colleagues have examined the ancestral origins and diets of eight of the ship’s crew members. Previous analyses of these remains predicted their professions according to the belongings they were found with. They were identified as a cook, carpenter, officer, gentleman, purser, young mariner and two archers.
The researchers took around 20 milligrams of enamel from each crew member’s teeth and analysed the chemical isotopes it contained.
“All the isotope elements in your food and drink get deposited in your bones and your teeth during early childhood,” says Scorrer. What’s more, the balance of isotopes in food and drink can vary from region to region, so by analysing the unique chemical fingerprint of isotopes in a given tooth sample, the researchers could infer the region in which an individual had spent their childhood.

Their analysis suggests that three of the crew may have originated from warmer, more southerly climates than those seen in Britain – perhaps somewhere on the southern European coast, Iberia or North Africa. The enamel of the remaining five crew members had isotope values consistent with a childhood most likely spent in western Britain.
However, one of the five brought up in western Britain had cranial characteristics typical of someone with African ancestry.
“This is the first direct evidence of a Black mariner in Henry VIII’s navy,” says Scorrer. Such a discovery would match historical texts, which suggest Black mariners did work in Tudor Britain. “There were extensive trade networks across Europe and much further afield at that time,” says Kate Britton at the University of Aberdeen, UK, who wasn’t involved in the research.
When the ship was recovered, the remains of at least 179 men were found. Although this research provides insight into eight of these individuals, there is still more to discover, says Scorrer.
Journal reference: Royal Society Open Science, DOI: 10.1098/rsos.202106

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By Alexander McNamara
and Matt Hambly

Worldspec/NASA/ Alamy
You may have heard that we are all stardust, but that isn’t strictly true. There are about 20 different elements in the human body, most of which were made inside ancient stars. There’s oxygen, which makes up about half of your body’s mass but only a quarter of its atoms, and then carbon, accounting for another 12 per cent. And just after that, there’s hydrogen, the only element in your body that wasn’t made inside a star long ago and flung into space by a supernova explosion. The hydrogen atoms in your body, accounting for a little over 10 per cent of you, were formed much earlier during the Big Bang, some 13.8 billion years ago.
The smallest insect on Earth is a wasp
The Mymaridae, commonly known as fairyflies or fairy wasps.Scenics & Science / Alamy

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There are more than 110,000 known species of wasp, and while we tend to think of them as the black-and-yellow-striped nuisances, wasps come in a huge variety of shapes and sizes. Only one third of species have stings, for instance, and while some live in colonies, the vast majority of wasp species are solitary. There’s even a wasp that can lay claim to the title of smallest insect on the planet. The Mymaridae or fairy wasp has a body length of just 0.139mm, shorter than that of an amoeba.
The first space walker became trapped outside his ship
Over the Black Sea. Museum: Memorial Museum of Cosmonautics, Moscow. Author: Leonov, Alexei Arkhipovich.Album / Alamy
Alexei Leonov became the first person to walk in space when, on 18 March 1965, he left the Voskhod 3KD spacecraft for 12 minutes. Although he spent such a short time alone in the vacuum of space, the walk was not without incident. Free from the atmospheric pressures of the spacecraft, his space suit ballooned, preventing him from getting back inside the airlock. Leonov had to bleed his suit of air until it was flexible enough for him to get back inside the ship. Despite the rapid decompression resulting in Leonov developing the bends, he made it back inside safely and returned to Earth shortly afterwards.
Marie Curie’s notebooks are still radioactive
Holograph note-book containing notes of experiments, etc. on radioactive substances, with rough pen-drawings of apparatus.Public Domain Mark/Wellcome Collection
Marie Curie was a physicist and chemist who became the first woman to win a Nobel prize. Along with her husband Pierre, she discovered two elements: polonium and radium. She also carried out pioneering research into radioactivity. At the time no one knew about the effects of radioactivity on the body, so they handled the elements they used in their research without any of the precautions or protective clothing we would use today. Curie even kept vials of what she was working on in her pockets or her desk drawers. More than 100 years after their discoveries, the couple’s notebooks are still so radioactive they have to be kept in lead-lined boxes and handled only while wearing protective clothing.
The largest dinosaur could have weighed 120 tonnes
Public life size model of Patagotitan dinosaurJosh Forwood/Alamy
Fossil remains of truly huge dinosaurs have been limited but after an astounding discovery in 2013, six specimens of a truly enormous beast, Patagotitan, started to emerge from the ground.
Since Patagotitan was discovered, it has often been described as the largest animal ever to walk the earth. Estimating the weight of these dinosaurs is not straightforward but recent analyses are in broad agreement. Patagotitan comes in at a whopping 55 tonnes, which is ten times the mass of an elephant, the largest living land animal.
However, a reappraisal of a dinosaur found in 1878 suggests it might have been twice as heavy as Patagotitan. The estimate is contentious, but if correct it would make Amphicoelias fragillimus, between 80 and 120 tonnes
On average, every square metre of land is home to 130 spiders
Jumping spider (Hypaeusbenignus) seen in rainforest of Costa Rica.Avalon.red/Alamy
Recent studies of web building and other spider behaviours have revealed that these arachnids possess unexpected intelligence. Their cognitive abilities include foresight and planning, complex learning, memory and the capacity to be surprised. Today, more than 48,000 spider species have been identified. They are hugely adaptable, living everywhere from the most northerly islands of the Arctic to deserts, caves, seashores and bogs. The Himalayan jumping spider even flourishes at altitudes above 6 kilometres, making it one of the world’s highest residents. On average, every square metre of land on Earth is home to 130 spiders.

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By Michael Marshall

Woven wrist cuffs found at a Viking burial siteAntiquity Publications Ltd/Rimstad et al/R. Fortuna, National Museum of Denmark
The remains of a Viking have been rediscovered after being missing for more than a century. They were safely stored in a museum the whole time, but had been mislabelled.
The person was buried with expensive grave goods, suggesting they were an elite person or even royalty. They also seem to have been wearing long trousers with elaborate decorations.

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The story begins in 1868, near the village of Mammen in Denmark. A local landowner named Laust Pedersen Skomager enlisted local farmers to help him remove the topsoil from a mound on his estate. They found it concealed a wooden Viking burial chamber, now called Bjerringhøj. The farmers dug up the contents and shared them out – so when academics arrived on the scene soon after, they had first to recover the remains from their new owners.
A re-excavation in 1986 determined that the burial took place in 970 or 971 AD, during the Viking Age, but recovered few new artefacts. When the researchers looked for the original remains in the National Museum of Denmark, they could not find them – and a search in 2009 of archives at the University of Copenhagen did not turn them up either.
However, since 2018 Ulla Mannering at the National Museum of Denmark in Copenhagen and her colleagues have been studying Viking-era textiles. As part of this, they examined the remains from another burial called Slotsbjergby. One box held human bones along with textiles – yet the descriptions of the burial site made no mention of bones being found with associated textiles. “I was puzzled about it,” says Mannering.

It slowly dawned on the team that the bones might be the missing ones from Bjerringhøj. “We were all wow with this idea,” says Mannering. She says the team knew this could be controversial, so they had to do several analyses to verify the finding.
They found that the number and types of bone match the Bjerringhøj set exactly, as do the textiles. “We don’t doubt that these must be the things that actually belonged to Bjerringhøj,” says Mannering.
The team says the Bjerringhøj Viking was an adult and probably male. He was buried with various textiles including wrist cuffs, a fragment of embroidered wool, and several woven pieces that were seemingly used in ankle cuffs. This implies that the man was wearing long trousers, although the trousers themselves are not preserved.
Furthermore, the wrist cuffs and pieces from ankle cuffs are strikingly similar, says Mannering. “Of course it was not the same object, but there seems to be an overall design idea.”
Journal reference: Antiquity, DOI: 10.15184/aqy.2020.189
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