Hallucigenia belongs to a group of worm-like marine creatures called lobopodians that lived during the Cambrian Period, ...

The hand stencil is more than 1,000 years older than the previous earliest evidence of rock art. Scientists have identified the world's oldest known rock art — a hand stencil created at least 67,800 ...

The first 1,000 people to sign up to Skillshare will get their first 2 months for free: <a ...