A rare coin featuring Charlemagne was rediscovered in a private collection and sold, via eBay, to a museum.
Many people give up meat for ethical, health or environmental reasons. But is it OK to put a cat or a dog on a vegetarian or vegan diet?
Discover how finding this habitable zone is essential to uncovered life on other worlds
The internet makes it easy for users to send and receive data almost instantly. But how can latency be reduced for faster communication?