Inventions aren’t always easy. Sometimes a humble leaf can get in the way. Developers have learned that one of the big hold ups in the creation of self-driving cars is teaching the cars to recognize changes in foliage as they drive the same routes each day. Odd Science: Amazing Inventions is filled with weird and wacky facts that you’ve never heard before. Read about the trainers made of spider silk, wonder at the first record played in space and tell your friends about the robot built in 1937.