FUN FACTS

1) The word “muscle” comes from Latin term meaning “little mouse“, which is what Ancient Romans thought flexed bicep muscles resembled.

2)There are 8 times as many atoms in a teaspoonful of water as there are teaspoonfuls of water in the Atlantic ocean
A teaspoon of water contains in it 2×1023 water molecules, but each water molecule is comprised of 3 atoms: two hydrogens and one of oxygen. If we laid down end to end each water molecule from a teaspoon down end to end, we end up with a length of 50 billion km — 10 times the width of our solar system.

3)It takes a photon up to 40,000 years to travel from the core of the sun to its surface, but only 8 minutes to travel the rest of the way to Earth

A photon, on average travels, a particular distance before being absorbed and released by an atom, which scatters it in a new random direction. To travel from the sun’s core to the sun’s surface (696,000 kilometres) so it can escape into space, a photon needs to make a huge number of drunken jumps.

4)In an entire lifetime, the average person walks the equivalent of five times around the world right on the equator. The average moderately active person takes around 7,500 step/day.  If you maintain that daily average and live until 80 years of age, you’ll have walked about 216,262,500 steps in your lifetime. Doing the math;  the average person with the average stride living until 80 will walk a distance of around 110,000 miles — which is the equivalent of walking about 5 times around the Earth, right on the equator

5) Killer whales are actually dolphins
Despite their name, killer whales or orcas are the largest members of the dolphin family. Orcas are also whales because delphinids belong to the Cetacean order within the toothed whale (Odontoceti) suborder. However, the term whale is typically reserved for baleen whales of the Mysticeti suborder.

The major physical feature that ensures orcas are dolphins is the presence of a melon — a fatty deposit that assists the animals in echolocation and only exists in dolphins.

6) You can’t taste food without saliva
In order for food to have taste, chemicals from the food must first dissolve in saliva. It’s only once they’ve been dissolved in a liquid that the chemicals can be detected by receptors on taste buds. During this process, some salivary constituents chemically interact with taste substances. For example, salivary buffers (e.g., bicarbonate ions) decrease the concentration of free hydrogen ions (sour taste), and there are some salivary proteins which may bind with bitter taste substances.

https://www.rd.com/culture/science-facts-never-learned/

https://www.livescience.com/19102-amazing-facts-earth.html