The sympathetic nervous system, which enables the fight-or-flight response, was thought to be present only in jawed vertebrates. Analysis of a jawless vertebrate suggests that this system might be ...

Trace fossils found in central Italy are the earliest evidence of vertebrates living on the deep seabed, the last habitat they colonized. Skip to main content. Thank you for visiting nature.com.

Experts have used CT scanning techniques to build up the first 3D pictures of these creatures, which are some of the earliest vertebrates (animals with backbones) in which the mouth is fossilized.

The earliest deep-sea vertebrates revealed by unusual trace fossils. Faculty of Sciences of the University of Lisbon. Journal Proceedings of the National Academy of Sciences DOI 10.1073/pnas ...

April 4 (UPI) --Most modern viruses have ancient roots.New research suggests RNA viruses are millions of years old, many tracing their evolutionary histories back to the earliest vertebrates.

The cradle of vertebrate evolution was limited to a zone of shallow coastal waters, no more than 60 meters deep. In those waters, fish — the first vertebrates — appeared roughly 480 million ...

New fossils are revealing the earliest jawed vertebrates — a group that encompasses 99 percent of all living vertebrates on Earth, including humans. Skip to content. Subscribe or renew today ...

Because we're a member of the group, it's easy to see vertebrates as the pinnacle of evolution, a group capable of producing bats, birds, and giant whales in addition to ourselves.

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 ...

All chordates, such as vertebrates, eel-like lancelets, and tunicates, or sea squirts, at some point in their lives have a flexible, rod-shaped nerve structure called a notochord in their backs. A ...

Earliest record of mating fossil vertebrates: Nine pairs of fossilized turtles died while mating 47 million years ago. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases ...

The earliest amniote fossils are from the late Carboniferous, about 320 million years old. 3D animation recreation of the reptile trackways 350 million years ago, as well as the age of the rock ...