But humans lost this ability around 25 million years ago, as our ancestors became more reliant on vision and complex vocal communication. The muscles responsible for ear movement — known as the ...

the March 21 New York Times article reported that some administrators wonder whether Trump’s cancellation of $400 million was an attempt to win back what he could not obtain 25 years ago.

Along the East African Rift, Lake Tanganyika lies in isolation among towering mountains. The lake is more than 400 miles long ...

However, by 25 million years ago the fast moving Indian continent had almost entirely closed over the intervening ocean, squeezing the sediments on the ocean foor. Since the sediments were ...

By 1.9 million years ago the two ice sheets repeatedly merged in the centre of the North Sea, filling the ‘fjord’, as they advanced and retreated in response to climate changes controlled by the Earth ...