Dark energy could change with time

Many birds have fabulous plumage to attract mates or send warning messages. Some of the colours in their feathers are produced by microscopic structures on the feather surface that absorb and reflect

The best rare birds seen all around Britain in December

How a Castilian knight fought Christians and Muslims alike to become a national icon

Amazing answers to your curious questions

In the works of Plato, a Greek philosopher who lived around 2,400 years ago, the island of Atlantis was said to have been drowned in the Atlantic Ocean after the hubris of its people angered the Gods.