Neural tissue normally dies quickly without oxygen. Yet bird retinas—among the most energy-demanding tissues in the animal ...

More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas ...

The discovery fundamentally changes the understanding of a structure in the avian eye that has been misinterpreted for centuries.

New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could ...

Biologists have finally solved a centuries-old mystery regarding how birds maintain sharp eyesight despite ...

Tiny self-propelled nanorobots use body chemistry to navigate directly to tumors and deliver cancer drugs more effectively.

“Looking at things at a very, very fast rate allows us to observe weird and wonderful phenomena,” Salamat says, calling the ...

A huge bar of iron has been discovered lurking inside the iconic Ring Nebula. The structure is enormous, spanning hundreds of ...

Chances are that all your encounters with frozen water—while trudging through slushy winter streets, perhaps, or treating yourself to cool summer lemonades—have been confined to one structural form of ...

In high enough doses, hydrogen cyanide can kill an adult human in minutes, but the chemical may be the reason why we’re here ...

Billions of cigarette butts end up on sidewalks, beaches, and gutters each year. They are small, easy to ignore, and hard to ...