From spears and the invention of the wheel to smartphones and robots, human societies have been building and using tools from the beginning. Human tool use has served to conquer new environments, ...

Add Yahoo as a preferred source to see more of our stories on Google. A Shark Bay dolphin using a sponge as a foraging tool. (Stephanie King/University of Bristol) A small population of dolphins in ...

Some bottlenose dolphins have learned to use tools to help them catch fish, a clever technique that may be passed on from mother to calf. Scientists in Australia observed dolphins chasing fish into ...