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Spiders could eat every human on earth in a year
The amount of prey consumed by spiders each year is far more than the total biomass of humanity. There is a pleasant thought.
The world’s spiders consume somewhere between 400 million and 800 million tons of prey in any given year. That means that spiders eat at least as much meat as all 7 billion humans on the planet combined, who the authors note consume about 400 million tons of meat and fish each year.
Or, for a slightly more disturbing comparison: The total biomass of all adult humans on Earth is estimated to be 287 million tons. Even if you tack on another 70 million-ish tons to account for the weight of kids, it’s still not equal to the total amount of food eaten by spiders in a given year, exceeding the total weight of humanity.
In other words, spiders could eat all of us and still be hungry.
They could, but they don’t. They eat a bunch of bugs and that is a fine thing.
Source: http://therealrevo.com/blog/?p=158276
