Shifts in the Earth's continental plates that drove long-term changes in sea level set the stage for the evolution of the earliest animals on Earth, a study suggests. A newly developed timeline of ...

New fossil analysis: Scientists reexamined ancient Brazilian fossils and found they were microbial, not early animal traces. Advanced imaging used: Nanoscale tomography and Raman spectroscopy revealed ...

Scientists have announced two landmark fossil discoveries that reshape understanding of evolutionary history. In Spain, the most complete stegosaur skull ever found in Europe offers fresh insight into ...

Embryonic germ layers are the fundamental organizing principle in animal development. They provide the structural basis from which tissues and organs arise. During early embryogenesis, cells divide to ...