Loading...For thousands of years, there has been one limiting factor in how much could be done by one person per day: light. When the sun went down, the only source of light humanity had to brighten up the place were candles and torches. Those work fine, but it was still pretty limiting. Humans simply went to bed when the sun went down and woke up when it rose, a system that works perfectly fine even to this day.
But some animals couldn’t afford to go to bed when the sun goes down, natural selection working it’s “magic” and evolving their eyes to be able to see in the dark, a good example being cats. How do their eyes work, and what adaptations have different animals made to see in the dark? The great video above, made by TED-Ed, explains the biology behind the eyes of a handful of animals that can see in the dark, from cats to moths to frogs.