Medium eggs must be a minimum of 21 ounces per dozen, or an average of 1.75 ounces each. Small eggs must be a minimum of 18 ...

Arthropods belong to an evolutionary branch – the ecdysozoa – that contains about half of all animal species, and the earliest fossil evidence of the group now dates back 550 million years ...

A worm-like creature preserved in ancient rock has just been identified as the oldest known relative of insects, spiders and crustaceans. Receive a weekly dose of discovery in your inbox! We'll also ...

Characterized by their cuticle -; a tough external skeleton that is periodically shed -; the group comprises three subgroups: nematodes, which are microscopic worms; arthropods, which include insects, ...

Characterized by their cuticle - a tough external skeleton that is periodically shed - the group comprises three subgroups: ...

A team of researchers has identified the earliest known ecdysozoan fossil, which originated from the Precambrian era.

A species of marine worm that scientists lost sight of for almost 70 years has finally resurfaced, thanks to some eagle-eyed sleuthing and a seahorse less than an inch long. When researchers ...

DURING an examination of the amino-acid composition of the larval cuticle of the blow-fly, Calliphora vomitoria, it was found that phenylalanine and tyrosine were readily removed by extraction ...