Grasses provide most of the world's calories—but we're only now starting to learn how they grow

If we want to dismiss something as irrelevant, we'd say that it's "as boring as watching the grass grow." And yet ...

Dark energy flips its sign, but the Hubble tension refuses to budge

For nearly a century, astronomers have known that the universe is expanding. In the late 1990s, two independent teams, the ...