Gödel's incompleteness theorems proved every consistent mathematical system contains unprovable truths.

The Gotthard Base Tunnel is one of the longest railway tunnels in the world.

Some people have survived falling from airplanes without parachutes.

The development of MRI technology improved internal imaging.

The world's first programmable computer, the Colossus, was built secretly in Britain during World War II to decode Nazi messages.

Sound travels about 4 times faster through water than through air.

Your brain can store the equivalent of millions of gigabytes of information.

The internet routes data in 'packets' — small chunks that may take different paths and reassemble at the destination.

Emotional appeals are often more persuasive than logical arguments.