When, and where, did the covid-19 pandemic really begin?
People carrying out disinfection work at a market in Wuhan, where covid-19 is thought to have originated, in March 2020
Most comprehensive picture yet of how organs age at different rates
Someone’s kidneys could be a decade older, biologically, than their brain Christian Kitzmuller/Alamy Our organs appear to age at different
How safe is the US food supply?
Produce has been the source of many foodborne illness outbreaks in the US this year The Image Party/Shutterstock Apple sauce
Hunter-gatherers built a massive fish trap in Belize 4000 years ago
Satellite image showing channels that formed part of an ancient fishery, and Mayan sites nearby Google Earth Archaeologists have discovered
Robotic pigeon reveals how birds fly without a vertical tail fin
A pigeon-inspired robot has solved the mystery of how birds fly without the vertical tail fins that human-designed aircraft rely
Australia wants to ban social media for under-16s, but it won't work
Attempts to prevent Australian children from accessing social media are likely to fail, and could do more harm than good
Plumes of pollution from big factories can make it snow
Factory aerosols can transform the clouds above Getty Images/iStockphoto Plumes of pollution from large factories can trigger snowfall and leave
How a single gopher restored a landscape devastated by a volcano
The northern pocket gopher (Thomomys talpoides) brings unexpected ecosystem benefits All Canada Photos/Alamy Two years after Mount St Helens erupted
AI helps robot dogs navigate the real world
Four-legged robot dogs learned to perform new tricks by practising in a virtual platform that mimics real-world obstacles – a
Cancer deaths expected to nearly double worldwide by 2050
Breast cancer cells that have metastasised to the liver Connect Images / Alamy The number of cancer deaths worldwide is