- 8. Oct, 2017
- 15. Oct, 2017
Picture of the week: Red Sea Revels (2)
Female bottlenose dolphins have adapted their vaginas to prevent fertilisation
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.
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.