What's so fascinating about dinosaur tracks? Maybe it's because their many mysteries beg for solutions. For instance, because tracks in mud are so short-lived today, how did dinosaur tracks ever preserve in the first place? Newly described prints bolster biblical creation's explanation of dinosaur footprints.

Casual observers are not the only ones who puzzle over dinosaur footprint origins. After all, other animal tracks in mud are not fossilized today because erosive processes rapidly erase them. If a rock layer requires thousands of years to solidify, then how were dinosaur tracks recorded in them?

How would a scientist estimate the time when a canyon formed? Various techniques and different interpretations of those techniques have yielded a wide range of estimated dates for the formation of Arizona's Grand Canyon. But results from a new technique are again challenging the canyon's previous date. Will science ever resolve the Grand Canyon dating game?

Scientists in China recently discovered that a supposedly simple, ancient creature had an unexpectedly complicated nervous system. The creature was an extinct arthropod found in Cambrian rocks, and it had remarkably preserved nervous tissues that showed it had a three-lobed brain connected to fully developed eyestalks.