Study shows only granddaughters are likely to benefit from having their paternal grandmothers involved in their early lives.

Tasmanian police found only one piece of forensic evidence at the crime scene: a leech, engorged with blood.

A woman was thrown out of a meeting on the North Shore's beach poisonings when she hurled objects at a Department of Conservation speaker.

A dog which died after visiting a Coromandel beach tests positive to the same toxin thought to have killed five dogs in Auckland.

A series of Herald graphics explores the science behind the tsunami that devastated Samoa.

Public health officers are warning parents to closely watch children - and look out for toxic sea slugs - on Hauraki Gulf beaches.

Sunbathing is known to cause skin cancer - but it may also help people survive when they get it, scientists are reporting.

Traces of the rat poison, Brodifacoum, have been found in two little blue penguins that died in the Hauraki Gulf.

The gender row over South African runner Caster Semenya shows the line dividing males from females is far from clear.

The head of the Department of Conservation said rat poison drops on two Hauraki Gulf islands should be delayed over public concerns.