An acorn worm leaves behind a mound of expelled sand that it has ingested while looking for organic matter. Besides, acorn worms aren’t exactly cute and cuddly. Each of the 70 or so species in the ...

The question of the origin of the vertebrates (including humans) from invertebrates is the most celebrated paternity suit in biology. Since they were first accused over a century ago, acorn worms ...

The question of the origin of the vertebrates (including humans) from invertebrates is the most celebrated paternity suit in biology. Since they were first accused over a century ago, acorn worms ...

One of the defining characteristics of chordates and other deuterostomes is the presence of gill slits, which first appeared in the acorn worm and persist vestigially in the human embryo. An ...

This week a report has shown that our "closest wormy cousins" live under the sea. Researchers from Okinawa Institute of Science and Technology Graduate University (OIST) and its collaborators have ...

Certain marine worms spend their larval phase as little more than a tiny, transparent “swimming head.” A new study explores the genes involved in that headfirst approach to life. A mud flat in Morro ...

Acorn worms live in burrows on the seafloor so you’re not likely to ever see one. But you may see their absolutely enormous piles of poop. Snorkelers and divers have noted them for years and Nat Geo ...

Most acorn worms live in u-shaped burrows under sand or mud, sucking the surrounding substance into their mouths. I have read about, and admired, acorn worms for years, but not wanting to harm one, ...

It turns out that the acorn worm is a cousin of ours. Of course, if you want to get technical, everything that exists on Earth or ever did or ever will is also a cousin of ours, barring a planetary ...

Discovered a new type of acorn worm, scientists have. Named it after Yoda, they did. The reddish-purple worm was found about 1.5 miles (2.5 kilometers) beneath the surface of the Atlantic Ocean, and ...

A fossilized creature shaped (let's just say it) remarkably like a penis may be the missing link connecting two mysterious branches of sea creatures. The fossils, more than 9,000 specimens in all, ...