
Nano-Kirigami: ‘Paper-Cut’ Provides Model for 3D Intelligent Nanofabrication
Researchers Report the Earliest Fossil Footprints
On July 20, 1969, Neil Armstrong put the first human footprint on the moon. But when did animals leave the first footprint on Earth? Recently, an international research team reported discovering fossil footprints for animal appendages in the Ediacaran Period (about 635-541 million years ago) in China. This is considered the earliest animal fossil footprint record. The…