It's become harder to imagine our solar system without a missing, mysterious Planet Nine.

NZ has attracted international praise for passing the strict criteria.

Some NZ deaths may have been prevented - but these were few of 1917's WW1 butcher's bill.

Scientists have built a stunning 3D model to capture a live heart suffering an attack.

Star Trek's disease-scanning "tricorder" could soon become reality with a new Kiwi study.

Can dogs detect lung cancer? A new Kiwi study seeks to get some answers.

Kidney disease is the latest ailment linked to air pollution, a new study has found.

Southern kids have higher rates of inflammatory bowel diseases. Is sunlight to blame?

Egide Kalisa lost his parents to air pollution. Now his research is tackling the problem.

Visiting Nobel Prize winner Dr Bruce Beutler transformed the field of immunology.

Jonathan Coleman says there is more work to be done on housing-related illnesses

High-fat diets are bad for bone health - especially for those born small or too early.

Why are our children dying from Third World diseases linked to unhealthy homes?

As soon as it gets cold, hospitals struggle with 'waves' of sick children.

A newly-discovered protein could point the way to a drug giving the benefits of exercise.

Closure may be the only option as one in five kauri now infected with deadly pathogen.

In polygamist Mormon town, sufferers can't sit or stand without help due to inbreeding.

NZ study raises possibility fresh fish oil may aid children of overweight pregnant women.

Bone marrow was found to "remember" the effects of exercise long after the exercise ended.

Health authorities concerned not enough young Aucklanders getting mumps vaccination.

Scientists will tap into the DNA data of thousands of young people in major new study.

OIA documents show a breakdown in communication in handling of Auckland typhoid outbreak.

New research could be a game-changer in the fight against malaria.

Councillor questions gastro support fund when extent of ongoing sickness still unknown.

Bug kills about 500 New Zealanders, with Maori, men and the poor at greatest risk.

The chef told biosecurity officers he wanted to give the duck meat to his son.

Steven Davey is saddened children smoke despite their parents dying of related diseases.

The number of people being diagnosed with HIV is on the rise.

A man wants to reclaim his life after he contracted a virus with a huge stigma attached.

Kiwis may risk catching the "Brexit virus" from pork imported from infected pig farms.