The evolutionary story of extinction and the rise of dinosaurs faces challenges, but survives when the glue of imagination holds fragmentary evidence together.
How does a growing flower bud or feather follicle know where to put the intricate colors and patterns on a mature flower or feather? Scientists are beginning to get partial answers.
Here are accounts of three very different animals whose behaviors have baffled scientists till now. Scientists are beginning to get at least partial answers for scientific mysteries by carefully observing and testing to see how things work.