When where bear trap invented?

What events cause the formation ogf fossil fuels? How was energy generated before the use before the use of fossil fuels? What did the Inca's use for fertilizer? When do humans burn fossil fuels? Where did cavemen get leather from? How do you post images on the message board on class jump? What foods did the kwakiutl eat other than fish moose and deer? What biblical story resembles the creation story of the Inca? How do you beat the hydra if you already beat it on Mythology Island? Food chain for grass? What epoch did Australopithecus live? How long have mermaids been around? Which reptiles ruled the world for more then 160 million years? What is the original name of the Galapagos Islands when they were first discovered 300 years before famous naturalist Charles Darwin's visit and were considered a pirate's paradise? What are two important fact about the food supply in the Neolithic Age? What crops did the Neolithic people plant? What is a prebionts? Did they tame animals in the old stone age or the new stone age? How do fossils support the ideas of common ancestry and evolution? What did the Aztecs use cochineal for?