Two-million-year-old molecular fossils reveal flourishing woodlands and widespread animals in Greenland's pre-Ice-Age past, and give hints to the Arctic’s future under global warming. We hear from a molecular palaeontologist and a climate modeller.

DNA also reveals the enduring genetic influence of our extinct Denisovan cousins on disease immunity in modern Island Southeast Asians.

And the art and science of 3D-printing violins

Producer: Roland Pease
Assistant producer: Sophie Ormiston

Image credit: Beth Zaiken/bethzaiken.com