Practical Engineering on MSN

What Keeps Massive Tunnels from Collapsing

Every tunnel pushes back against the weight of the Earth - and survives because of one simple idea. Learn how rock bolts and ...
Live Science on MSN

Study reveals why the brain 'zones out' when you're exhausted

When you zone out after pulling an all-nighter, the brain flushes outCSF), which surrounds the brain and spinal cord and is ...