I never understood why you can’t go faster than light - until now! (YouTube) An intuitive explanation for why objects can never react the speed of light?
But as soon as two drops of blood have thus passed, one into each of the cavities, these drops which cannot but be very large, because the orifices through which they pass are wide, and the vessels from which they come full of blood, are immediately rarefied, and dilated by the heat they meet with.