The world’s largest economy and second-largest emitter of greenhouse gases will withdraw from the global climate pact, disrupting efforts to tackle climate change

The US contributes around a fifth of the budget for the World Health Organization – its withdrawal from the public health body will impede efforts to control the global spread of diseases and could put the US at risk

The megaflood that refilled the Mediterranean Sea 5 million years ago was so huge and fast that it shaped the landscape of what is now Sicily

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show

Observations of WASP-127b, a giant gas exoplanet more than 500 light years from Earth, suggest it has phenomenally high wind speeds