Entomologists study insects and spiders. They regularly discover examples of mathematical genius hardwired into various tiny-brained arthropods. And as young students know all too well, math doesn't come easy.

Being the first ever to examine a dinosaur fossil long buried in sedimentary rock is thrilling enough for a field researcher. But a team working in Canada found an exhilarating bonus on a hadrosaur fossil fragment—it had actual skin still attached.

Yunnan Province, China holds some very special eggs, containing the tiny bones of unborn sauropod dinosaurs. Within the Lufeng Formation, a relatively thin bed of red sediment contains these fossil eggs, mixed and buried amidst other fossils. While perhaps providing new clues to the ways sauropod dinosaurs developed from embryos, they also bear distinct marks of very recent flooding.