Wikipedia has over 60 million articles across 300 languages — and is mostly maintained by volunteers.

Volcanic ash can damage engines and machinery.

The first computer virus was created in 1983 as an experiment — it spread via floppy disks and was called 'Elk Cloner.'

The printing press allowed books to be reproduced more efficiently.

The electric motor converts electrical energy into motion.

The concept of email predates the internet — early forms existed on mainframe computer networks in the 1960s.

Moore's Law observed that transistor density on chips doubles approximately every two years — this held for roughly 50 years.

The invention of the compass improved long-distance navigation.

The compass improved navigation at sea.