Gerry Cassis

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  • Team Leader, Species Interactions, Atlas of Living Australia, UNSW
Taxonomists are in the business of classifying the life we see around us – plant, animal and otherwise. Gnilenkov Aleksey

Explainer: what is biological classification?

Gerry Cassis, UNSW

For taxonomists, days often start – and sometimes end – with the question: what’s that? Whether you’re an entomologist, staring at a new species of riffle bug from a rainforest stream, or a paleontologist…
Estimates on the possible number of species vary wildly. Holger Hollerman/AFP

8.7 million species now estimated on Earth (and then some)

Gerry Cassis, UNSW

An estimated 8.7 million species exist on Earth, according to a paper published today in PLoS Biology. The figure is based on a new validated analytical technique that, it’s said, significantly narrows…

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