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Emperor penguins become first creatures to be counted from space

The first census of an entire species using satellite images reveals double the number of the birds, meaning the impact of climate change can be monitored far more accurately

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A woman feeding gulls in a Brighton park. The photographer is trying to trace her after the picture won an international competition at the Los Angeles festival - do you know her? Photograph: Barcroft Media/Clive Frost

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Photographer Nicolas Wilmouth’s Cabinet of Curiosities

Taxidermied birds photographed in the style of 17th-century oil paintings

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A two week-old eastern bongo calf looks out from under her mother at Sydney’s Taronga zoo. Eastern (or highlands) bongos are critically endangered with as few as 75 remaining in small groups of 6-12 animals in their Kenyan upland range. Bongo are one of the largest species of antelope in the world and are recognised by their striking russet colour and large antlers which extend over their backs Photograph: William West/AFP/Getty Images

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Photograph: Marizilda Cruppe/Greenpeace

The controversial Belo Monte dam and hydropower plant in the Amazon - a gallery of its construction

The Belo Monte would be the third largest dam in the world, and the second largest in Brazil. It is expected to submerge as much as 400,000 hectares and could displace an estimated 20,000 people

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Photograph: Bonhams

The Austin Mini Se7en De Luxe - the oldest surviving unrestored mini to go to auction. How old is it and how much is it expected to fetch?

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Astounding stereographic projection by Greek photographer Chris Kotsiopoloulos combines 24 hours into a single panoramic photograph.

We like to show our 24 hours in pictures in a gallery, but this is pretty nice too