Do insects feel pain?

Yes, at least if we understand pain as physical discomfort caused by environmental factors. “Insects have nerve endings similar to the ones we humans have. Therefore, it is reasonable to assume that they have some kind of sensory perception equivalent…

How to identify an animal by poop?

Pay attention to color, smell, texture, and shape. With this, it is already possible to deduce the size of the animal and, mainly, its diet. “Dark stools, for example, indicate consumption of animal proteins, that is, it is a carnivore”,…

How did the deck suits come about?

The current suits emerged from a mixture of the Spanish and French versions: the names of the suits came from Spanish, but the graphic symbols that represent them are French. Until reaching the current 52-piece deck, cards have gone through…

Who are the presidents on the dollar bill?

The seven notes of dollar in circulation depict five former US presidents: George Washington (1732-1799), Thomas Jefferson (1743-1826), Abraham Lincoln (1809-1865), Andrew Jackson (1767-1845) and Ulysses S. Grant (1822-1885) ). The other two honorees are Alexander Hamilton (1755 or 1757-1804),…