The color of a person’s period blood can indicate different health conditions. For example, a bright red period indicates a healthy flow, while darker red or dark brown can signify pregnancy.

When threatened, they rise up on their front legs and arch their back, sometimes even flipping themselves over completely, to reveal the bright red-and-black coloration of their underside.

More than giving a spy movie vibe, a red screen could help sharpen people's night vision by reducing the harmful effect of ...