The polypterids (bichirs and ropefish) are extant basal actinopterygian (ray-finned) fishes that breathe air and share similarities with extant lobe-finned sarcopterygians (lungfishes and tetrapods) ...

Cockroaches are infamous for their tenacity, and are often cited as the most likely survivors of a nuclear war. Some even claim that they can live without their heads. It turns out that these armchair ...

What might be mistaken for a waterslide in this image is actually the breathing tube, or trachea, of a dragonfly. This tube connects to openings in the insect's exoskeleton (outer “shell”) called ...

The emergence of life from water on to land is a pivotal moment in evolutionary history, and scientists say a new discovery may shed light on how it was able to happen. Palaeontologists have verified ...

This article originally appeared on The Conversation. A century-old mystery about how ancient freshwater fishes breathe has finally been put to rest, thanks to a study published last week in Nature ...