Toilet paper, a product that is used for a few seconds before being disposed of forever, is typically made with trees, energy ...

This rainforest tree solved one of evolution’s hardest problems. Here’s how it evolved to use tension and geometry to fire ...

Violent crackdowns on anti-government protesters in Iran are drawing attention from Trump and condemnation from international ...

Spot polar bears in the Arctic, see black rhinos in Namibia or marvel at the wonders of our own shores on the ultimate nature ...