Trees are tall. Humans, relatively speaking, are not. And we're not the most agile climbers in the animal kingdom, either. But we are crafty, and we can out-think even the most wizened redwood. But ...

At the end of the 18th century, the British scientist Henry Cavendish measured the force of gravity between two objects for the first time in a laboratory. The objects in question were lead balls, one ...

Did Mount Everest shrink after Nepal’s massive 2015 earthquake? Has it lost a few meters of snow cover due to global warming? Is it getting taller due to shifting continental plates? To clear up these ...