Scientists studying a 250-million-year-old fossil say they can now say with confidence that our mammal ancestors laid eggs. The fossil, found in South Africa, belonged to an embryo of the Lystrosaurus ...

Thousands of feet below the surface, the Antarctic seafloor is a time machine to another realm. Here’s how one scientist ...

The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

A remarkable discovery answers one of the greatest survival stories in Earth’s history—and a decades-old scientific mystery.

Detailed imaging of a 250-million-year-old fossil has revealed the first proof that the ancestors of mammals laid eggs. The ...

Executive producer Brad Rau tells io9 about that encounter between Maul and Devon—and one strange sound in particular.

Over four decades, the Alien franchise has brought many different versions of the xenomorph creature to theaters.

Add Yahoo as a preferred source to see more of our stories on Google. Hens lay about one egg per day, on average. Even fewer of us have seen it the way the folks at @chickenwifehappylife captured it.

What’s worse than finding a lanternfly in your Big Apple? Try millions of them. The dreaded, now-annual hatch of the invasive polka-dotted pests is less than a month away — leaving New Yorkers are ...

Three bald eagle chicks have hatched in a nest on Santa Cruz Island off Ventura. Here's how to watch the eaglets.

This weird object sparked amusing reactions online, with users suggesting it should be 'killed with fire.' ...