The dorsal raphe nucleus (DRN) serotonergic (5-HT) system has been implicated in regulating sleep and motor control; however, its specific role remains controversial. In this study, we found that ...

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

By examining genetic clues that linger in adult cells, scientists have now gained surprising insights into the developmental ...

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

The brain is the body's command center, and neurons are the workhorses that carry out its commands. They transmit signals ...

While we often think of hummingbirds as sucking nectar from flowers, they're not sucking the way we suction juice through a ...

Two unrelated groups of nectar eaters, hummingbirds and sunbirds, have evolved different techniques to slurp the sweet liquid ...

Unusually well-preserved fossils have provided the earliest known evidence of a land vertebrate that could pump air in and ...

While we often think of hummingbirds as sucking nectar from flowers, they're not sucking the way we suction juice through a ...

Hummingbirds and their Asian and African counterparts, sunbirds, feed by sticking their tongues and beak tips into pools of ...

We use our eyes constantly without ever questioning how they came to be — two forward-facing windows that feel like the most ...

An Amazonian bird turned out to be five distinct species; two of them were previously unknown to the scientific community.