Anxiety, the psychological and physiological state characterized by an anticipation of potential threats and a heightened ...

In the past, various researchers have placed yunnanozoans into multiple clades, including cephalochordates (a clade of rudimentary invertebrate marine animals), hemichordates (considered to be a link ...

My, what small teeth they had. A newfound treasure trove of ancient fish fossils unearthed in southern China is opening a window into the earliest history of jawed vertebrates — a group that ...

Vertebrates (animals with vertebrae) constitute a large group of animals including fish, amphibians, reptiles, birds, and mammals. A remarkable stage in their evolution was the transition from ...

Myelin appears suddenly in vertebrates, animals with backbones that arose 500 million years ago. Not a trace of it is found in the ancestral line that preceded the arrival of vertebrates.

Fish: Vertebrates that live in water and breathe using gills; Fish are defined as vertebrates (meaning they have a backbone) that live in water and use gills to breathe.

The night lizards may have been the only terrestrial vertebrates that survived in the region of the asteroid impact 66 ...

A large meta-analysis has found that the drug leading the charge in anti-aging science is just as effective in protecting ...

New research shows the anti-aging drug Rapamycin extends lifespan as effectively as dietary restriction in vertebrates.

Researchers found that night lizards survived the dinosaur-killing asteroid strike at the end of the Cretaceous, despite ...

Drift outside the realm of vertebrates, however, and you can generate an intelligent brain in much weirder ways—from our perspective, anyway. “It’s a Wild West,” she said.

For human beings and 99.8% of our fellow vertebrates, having jaws is an integral part of life. Just try eating a taco without them. But, like everything else in our bodies, jaws had to start ...