Are there global food allergy hotspots?

Do food allergies vary around the world – and if so, why?

• 29 mins

Where in the world will I weigh least?

We tackle gravity - a fundamental force of the universe, yet also an everyday mystery

• 26 mins

How do you measure a mountain?

As sea levels rise, will mountains shrink? How do we measure height above sea level?

• 26 mins

Why do animals swallow rocks?

Answering your questions about life, Earth and the universe

• 29 mins

Why am I always late?

Why do some people find it easier to be punctual than others?

• 26 mins

Can we feed everyone?

We ask leading agricultural experts about global food security

• 31 mins