Sediment studies rule out impact as cause of ancient cold spell.

Pinning longevity to benefits women bestow on their grandchildren may not be plausible.

Pinning longevity to benefits women bestow on their grandchildren may not be plausible.

Russell L. Ciochon and his team are in Indonesia investigating the geological source and age of one of the world's biggest caches of

Russell L. Ciochon and his team are in Indonesia investigating the geological source and age of one of the world's biggest caches of .

Scientists accuse officials of neglect as chemicals discolour stored relics.

Scientists accuse officials of neglect as chemicals discolour stored relics.

A harsh climate did not stop humans moving to northern Europe nearly a million years ago.

A harsh climate did not stop humans moving to northern Europe nearly a million years ago.

At 94, Halet Çambel is seen as a 'scientific hero' in Turkey.

Finds in Turkey could answer key questions about ancient human origins, but palaeoanthropologists there must first bury their disputes. Rex Dalton reports from the field.

Two-billion-year-old fossils could indicate steps towards multicellularity.

Two-billion-year-old fossils could indicate steps towards multicellularity.

US Army social-science programme loses director.

US Army social-science programme loses director.

Ancient human relative could walk upright.

Ancient human relative could walk upright.

Radioactive isotopes nail the timeline of Egyptian dynasties.

Radioactive isotopes nail the timeline of Egyptian dynasties.

But analysis also reveals close links to Palestinians and Italians.