Where does the phrase 'I'm on cloud nine' come from?

What does 'cloud nine' have to do with happiness?

This caller answered the question of what a vitamin is

What is a vitamin?

Lizzy Ratcliffe of the Royal Society of Chemistry, with some of the redundant tech gathered by staff.

Gadgets Hoarded In Our Drawers Contain Endangered Elements

Running in the rain will keep you drier

Do You Get Wetter Running Or Walking In The Rain?

Magnet

How Are Magnets Made?

A promo for Cadbury's flake

Why Don't Flakes Melt?

Police helicopter in Hungary

Why Do Helicopter Pilots Sit On the Right Hand Side?

Rear-view mirror

Why Do Objects In The Rear-View Mirror Appear Further Away Than In The Wing Mirrors?

The number 7 with a line drawn through it

Why Is Seven Sometimes Drawn With A Line Through It?

How does a Thameslink train know carriages are full?

How Does A Train Know How Full Carriages Are?

Man looking at phone

Why Won't Facial Recognition Unlock Your Phone If You’re Looking Sideways?

Milky Way

Why Are Stars And Planets Spherical When Galaxies Seem Flat?

Man using hand sanitizer

What Happens To All The Dead Germs When You Use Hand Sanitizer?