Nature Podcast – This week’s show is evolution-tastic; we’ve got group selection, a ‘proto-eye’ of the kind predicted by Darwin and we delve into the genome of the now extinct woolly mammoth. Plus, a tantalizing trace of dark matter detected by a balloon experiment above Antarctica.

Obesity linked to grandparental diet

Mice eating high-fat foods confer changes on at least two subsequent generations.

Rhesus protein stops blood becoming acidic

Blood-group-factor family has a role in pH control.

Nuclear renaissance plans hit by financial crisis – Premium content

Role of fission in fighting climate change looks likely to wane.