If you're visiting a sandy beach you may like to reflect on something that might be going on below your feet. Lurking behind ...

Marine iguanas were described as “imps of darkness” by naturalist Charles Darwin. Learn more in our expert guide by the ...

Less ice means that less of the sun’s energy is reflected back into space. Instead, it is absorbed by the dark surface of the ...

Because growing conditions vary from year to year, the rings are not uniform. The record of good (wide ring) and slow (narrow ...

“I once worked at an elevation of more than 5,000m in Bolivia and it was very difficult to breathe, eat and sleep.” Initially ...

But cleverness is hard to define - animals have to contend with different challenges in life and what might be clever or ...