Science
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Traces of unknown ancestor emerged when researchers analysed genomes from west African populations -
As scientists race to trace out paths the virus might take we ask the crucial questions
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Stupendemys geographicus, armed with sturdy horns, lived from about 13m to 7m years ago alongside giant crocodilians -
Scientists say animals can become more or less bold and adventurous as they grow up -
The theoretical physicist on distinguishing between fact and opinion, why he’d travel forward in time instead of back, and the value of religion
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It’s red, it’s cold, it’s 4bn years old: Nasa data from Arrokoth reveals ‘profound truths’ about the solar system -
What are the symptoms caused by the virus from Wuhan in China, how does it spread, and should you call a doctor? -
Science Weekly podcast
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Cosmologist Dan Hooper winds the clock back to the birth of the universe, exploring mysteries from dark matter to the infinities of space -
How did complex life on Earth begin? Hannah Devlin dives into the 12-year scientific odyssey that has revealed an important clue to one of our most difficult, and fundamental, questions -
The ocean floor is teeming with life, from scaly-foot snails to giant spider crabs. But it is also home to metals and minerals. Nicola Davis explores what lurks in the deep -
A new virus, never before seen in humans, has emerged from the city of Wuhan in China. This week Hannah Devlin finds out what the virus is, and how we can potentially mitigate its spread.
Key issues
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Cosmologist Dan Hooper winds the clock back to the birth of the universe, exploring mysteries from dark matter to the infinities of space
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The nation pauses for Bramble Cay melomys day
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Budget cuts in England and Wales have reduced independent oversight – and could lead to serious miscarriages of justice, says forensic scientist professor Angela Gallop -
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The answers to today’s puzzles -
The answer to today’s puzzle -
Celebrate a calendrical rarity -
The solution to today’s problem
Multimedia
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Cosmologist Dan Hooper winds the clock back to the birth of the universe, exploring mysteries from dark matter to the infinities of space
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New images taken by the Inouye solar telescope in Hawaii show the sun's surface in unprecedented detail thanks to its 30km resolution - more than twice that of other solar observatories
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Tiny 'xenobots' created by scientists from live cells could help clear human arteries, clean microplastics from the oceans and find radioactive waste
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Scientists have conducted an experiment where they put 3D glasses on cuttlefish to show they use stereoptic vision for depth perception
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People gathered across parts of Asia and the Middle East to watch an annular solar eclipse, also known as a ring of fire
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Annular solar eclipse, in which the moon does not completely cover the sun as it transits across the star’s face, was seen from Asia to the Middle East
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