Ian Sample talks to Prof David Spergel, the independent chair of a Nasa panel established to investigate sightings of UFOs, about what they hope to find and why there is so much stigma attached to this field

Some patients’ health-related life quality scores worse than those of people with stage 4 lung cancer

Reptile had been in captivity for 16 years when zookeepers discovered eggs, journal reports

Metre-long piece of timber was found in trench dug for workshop at property in Boxford, Berkshire

Sam Altman, the founder of the revolutionary application Chat-GPT, is touring Europe with a message: AI is changing the world and there are big risks, but also big potential rewards

Behaviour predates humans by tens of millions of years but evolutionary purpose is less clear, scientists say

Three studies add weight to growing evidence that physical activity can help patients who have the disease

Leading scientists write to PM amid campaign against expansion of clean air zone in London

Ian Sample talks to Dr Rachel Clarke about her experience working in palliative care in the NHS and now with hospices in Ukraine. She tells him what dying can teach the living, what we can learn from the Covid pandemic, and reveals the anguish and defiance of trying to provide a dignified death in the midst of war

Book based on May 2022 review ‘did lockdowns work?’ examines whether legally enforced interventions prevented deaths