It is estimated that there are over 3 million undiscovered shipwrecks in the world's oceans.

Flowers communicate with bumblebees using electricity. If a flower hasn’t been visited recently, it emits static that tugs at tiny hairs on a bee’s back, signaling available nectar.

The loudest shout ever recorded was by a primary school teacher who yelled, 'Quiet!' at 121.7 decibels - loud enough to cause hearing damage. This record has held strong for 30 years.

Salt was so valuable in ancient times that it was used as currency. The word 'salary' comes from the Latin 'salarium', meaning the allowance Roman soldiers received to buy salt.

The two sides of aluminium foil have different appearances simply due to the manufacturing process. Both sides work identically for cooking or storage.

During breastfeeding, a baby’s saliva can flow back into the mother’s breast, signaling her body to adjust the milk’s immune components to meet the baby’s needs, a process called 'retrograde milk flow.'

Orcas (killer whales) experience their own versions of fashion trends. In one summer during the 80s, the popular thing among them was to balance a dead salmon on their heads.