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Picture of the week: Red Sea Revels (2)

Heteractis magnifica with Dascyllus trimaculatus and Moon wrasse (Thalassoma lunare). Anemone City, Red Sea.

Female bottlenose dolphins have adapted their vaginas to prevent fertilisation

Foto:Flip Nicklin/Minden Pictures/FLPA

Female bottlenose dolphins  seem to have evolved a method to protect them from fertilisation by unwelcome partners. A combination of precise positioning and complex vaginal structures means that subtle mid-copulation movements by females could send the penis the wrong way in their vaginas, preventing fertilisation. Biologists call this 'antagonistic co-evolution'', meaning that females that possess traits to avoid multiple matings will be more likely to survive, resulting in a change in the form of their organisms.

Ice monster: Laurent Ballesta's winning picture.

Laurent Ballesta from France captured this image called Ice Monster  at East Antarctica. The picture was taken with Nikon D4S; 13mm f2.8 lens; 1/30 to 1/60 sec at f6.3 , ISO 3200; Seacam housing and strobes.  It is an assembly of  147 stitched images.  Winner 2017  Earth’s Environments, Natural History Museum, London.

 

 

 

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Dramatic decline of insects

Insects are  crucial for biodiversity, but have recently  shown a dramatical decline. What entomologists already suspected  has now been confirmed  in a comprensive study in Germany. Modern agriculture with its pesticides seems to be the major culprit.