In the starkness of winter, squirrel dreys reveal themselves in the tree canopy. They’ve been there all along — just screened by trees’ leafy crowns for much of the year. Dreys are shaggy masses of ...
In 1983 archaeologists excavating a cave in South Africa discovered an unusual femur bone. It belonged to an unspecified antelope and was found to be 7,000 years old. X-rays revealed that three ...