NASA’s Swift space telescope is reaching the end of its two-decade run in orbit – unless a satellite launched on 3 July can give it a lifesaving boost

Female orangutans are generally solitary, but they travel more and eat less in an apparent effort to ensure their offspring have someone to play with

It will be some months before the true toll of Europe's worst-ever heatwave is confirmed, but researchers can estimate a death count based on how many people died in Europe during previous hot periods

The question of how gravity interacts with the quantum world has long perplexed physicists, but a non-quantum theory of space-time could present an answer

A proposed technique to counter global warming by spraying sun-reflecting particles near the poles would cause commercial flights to pass through clouds of sulphuric acid, posing a danger to passengers and crew

A prototype cell partly capable of replicating itself has been created using 36 existing bacterial genes, but it's not really a living organism – yet