Iguana-sized dinosaur cousin discovered in Antarctica

250 million years ago, it was covered in forests and rivers, and the temperature rarely dipped below freezing. It was also home to diverse wildlife, including early relatives of the dinosaurs. Scientists have just discovered ...

Weirdly shaped mouse sperm can be used to tell species apart

Think back to health class and picture a sperm. It's got a smooth rounded head, with a long skinny tail at the end, right? As it turns out, the sperm from different species of animals have different shapes—and, as a new ...

How a rat and bat helped heal a 90-year cultural rift

Tyrone Lavery, postdoctoral researcher at the Field Museum in Chicago, traveled nearly 8,000 miles to find two species—a giant rat and a monkey-faced bat—in Malaita, one of the Solomon Islands' largest provinces.

How plants evolved to make ants their servants

Plants are boring. They just sit there photosynthesizing while animals have all the fun. Right? Not so much. Take a look at the interactions between ants and plants—plants have evolved features specifically to make them ...

Tiny beetle trapped in amber might show how landmasses shifted

In 2016, Shuhei Yamamoto obtained a penny-sized piece of Burmese amber from Hukawng Valley in northern Myanmar, near China's southern border. He had a hunch that the three-millimeter insect trapped inside the amber could ...

Birds' voiceboxes are odd ducks

Birds sing from the heart. While other four-limbed animals like mammals and reptiles make sounds with voiceboxes in their throats, birds' chirps originate in a unique vocal organ called the syrinx, located in their chests. ...

Easter Island's society might not have collapsed

You probably know Easter Island as "the place with the giant stone heads." This remote island 2,300 miles off the coast of Chile has long been seen as mysterious—a place where Polynesian seafarers set up camp, built giant ...

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