The Chicken, or gallus gallus domesticus if you're not on colloquial terms, needs no introduction or explanation. If you've lived on planet Earth for any length of time, there is no doubt you've come into contact with some form of chicken - be it as a pet, at a farm, or on a plate.

Incredibly, chicken is not a generic term for a larger genus or species of bird, but is itself a domesticated subspecies of the Red Junglefowl, a bird native to parts of Southeast and South Asia. Molecular evidence suggests that we've been domesticating the Junglefowl as far back as 8,000 years ago, which is convenient for any budding time traveller wanting to make a six billion four hundred and seventy-five million egg omelette (coincidentally, the number of eggs presumed to be produced a year with the 25.9 billion chickens living as of the year 2019, assuming each chicken is capable of 250 eggs a year). Egg-cellent.