52K views · 586 shares | Under the Earth’s surface there is a vast hidden world of organisms. Scientists call these subterranean creatures, deep life, and there is over 25 billion tons of them living in our planet’s depths. #MicroscopicMonday Watch full episodes of #WhatonEarth on Science Channel and on SCI Go. https://bit.ly/2ZBx07r | Science Channel | Facebook

In celebration of World Wildlife Day, here's the great Sir David Attenborough in an archive clip from Life on Earth. 🌍 | BBC