Biology

There are huge gaps in what we know about sperm, from how they navigate to why sperm counts are tumbling. The BBC unravels why we know so little about this perplexing cell.

Trillions of bacteria, fungi, viruses and single-celled organisms travel the globe high in the atmosphere. Scientists are finding that they play a role in the weather and our health.

Living with animals is thought to have profound effects on our immunity – potentially reducing the risk of allergies, eczema and even autoimmune conditions.

Seed oils like canola and sunflower oil have attracted controversial claims about harmful effects in recent times. Is there any truth to them?

We tend to associate dinosaurs with ground-shaking roars, but the latest research shows that this is probably mistaken and they probably sounded very different.

If one of a pair of twins is allergic to something, does that mean the other twin will be sensitive too?

The creation of three "dire wolf" pups has raised hopes that it may be possible to resurrect extinct animals. But some scientists have grave concerns.

As US President Donald Trump takes aim at the Smithsonian Institution for "anti-American ideology", Adam Rutherford examines what the science of genetics has taught us about race.