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What's Earth's dominant species by mass?
You might have heard that all the ants in the world weigh as much combined as all the humans. That isn’t true. We outweigh ants 5 to 1.1 Termites might have us beat, though.2 Either way, it’s not r…
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2
Tides are weirder than you think
Our world relies on the sea more than ever: 80% of goods traded worldwide move by ship. Today’s mariners take it for granted that they can get an accurate chart of the tides for any location on Ear…
3
The mystery animal on an ancient god's head
Several Egyptian gods are depicted with animal heads. Horus has a falcon head, Anubis has a jackal head, Thoth has an ibis head (except when he’s a baboon), and Set has…uhh, what is that, exactly? …
4
How to put 170 atoms in an atom
You might already know that atoms are mostly empty space. Physical size behaves a bit weirdly at the atomic scale, but essentially the radius of an atom’s nucleus is tens of thousands of times smal…
5
The mountain that weighed the Earth
Suppose you want to find out how much you weigh. It’s easy enough – get a scale, stand on it, and read the number. Now suppose you want to know how much the Earth weighs. You get out a scale and…hm…