Octopuses have blue blood, three hearts and a doughnut-shaped brain. But these aren’t even the most unusual things about them! Known for their otherworldly look and remarkable intelligence, octopuses ...

The idea that royals and nobles have "blue blood" originates from medieval Spain, where the term sangre azul — blue blood — emerged as a way to distinguish the aristocracy from others in society.

A Royal insider said: 'It can take some courage to give blood and Prince Harry is setting a fine example, although it has led to much mirth over who will be the lucky recipient of blue blood.' ...

Blood sampling is frequently an important part of these investigations. The heart is the most commonly used venipuncture site in snakes because it yields a reasonably large sample. This column ...