Biology

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The difficult thing is how to measure it, because people will probably over-estimate. from www.shutterstock.com.au

Health Check: how long does sex normally last?

If you're a non-scientist, you might have once asked yourself, propped against the bedhead after disappointingly quick intercourse, how long does sex "normally" last?
View of Port Jackson, Fort Macquarie and part of Sydney Cove, in 1836. Govett, William Romaine/National Library

Charles Darwin’s evolutionary revelation in Australia

Charles Darwin visited Australia 180 years ago, and while here, he had a revelation that helped spark his insight into evolution by natural selection.
Tick tock, tick tock… You can’t hide from the molecular clock. www.shutterstock.com

Explainer: what is the molecular clock?

The molecular clock is helping us deepen our knowledge of evolution and completing the tree of life. But how does it actually work?

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