Spiders eat so much food in comparison to their own body weight that they could technically eat every human on Earth within a year if they tried.
One of the most common fears on Earth is a fear of spiders. Arachnophobia, to give it its scientific name, but in all honesty, most of us don't have arachnophobia. The large majority of those of us who don't like spiders simply aren't fans of creepy crawlies, and arachnids top that list.
It's difficult to put your finger on why most of us dislike spiders so much. Maybe because of all the things spider-sized, our eight-legged friends seem to be able to find their way into our homes the most often. Also, some species of spider can bite and if you live in certain parts of the world, those bites can be fatal.
However, for the most part anyway, spiders are pretty harmless. Unless you live in an exotic country then spiders are really nothing to be afraid of. Some helpful scientists have pointed out how terrifying spiders could be though if every one of them on the planet worked as a team. In fact, when you crunch the numbers, if all spiders suddenly got a taste for humans, arachnids could wipe us out entirely in less than a year.
A scary thought, we know, but thankfully, not one we have to worry about as no spider on Earth can or wants to eat a human being. The science and math behind it is pretty fascinating though, as laid out by The Independent. The world's spiders eat between 400 and 800 million tonnes of prey every year. Since it is estimated that the total weight of all humans on Earth comes to around 287 million tonnes, you can see why it wouldn't take man-eating spiders long to wipe us out.
The full report, published in the Science and Nature Journal, delves even deeper into the diet of the spider. Despite their tiny size, collectively, spiders eat around the same amount of food as the world's whales do each year. That's right, whales could eat us all too if they felt like it. That one was probably a little less surprising, plus the marine creatures would have a much harder time getting to us than spiders.