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

The youngest chimpanzees are the biggest risk-takers. Would humans show the same pattern if adults weren’t keeping such a ...

The hollowed-out trunk of the ancient yellow cedar felt like a cocoon with its soft floor of bark strips. A mother bear had molded this bed when she came each year to hibernate and to birth her cubs ...