Meet the tuatara, the sluggish ‘living fossil’ with the fastest sperm in the reptile world

New Zealand researchers seeking to protect the at-risk species from a warming world have made a surprising discovery

Tuatara - the ancient, slow-moving, living fossil" reptiles unique to New Zealand - have surprised researchers with their fast-moving sperm.

The discovery came amid a new effort by scientists to gather and preserve the sperm of the protected at-risk species, to try to ensure it survives new threats and a warming planet.