A 150-million-year-old, sharp-toothed fossil is believed to be the world's oldest piranha-like specimen.
Two snub-nosed monkeys sitting on a stone is the top shot at Wildlife Photographer of the Year 2018.
Ian Kiernan's iconic anti-litter campaign, begun in Australia in the 1980s, became a global success.
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What being in space tells us about our bodies on Earth
What happens to waste on the White Continent?
Can a fragrance trap a "man-eating" tiger?
How to save the world's most trafficked animals
The five key messages from the landmark IPCC report
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