Our observable universe shines with the light of hundreds of billions of galaxies, each with hundreds of billions of stars, vast clouds of gas and dust, nebula cast off in explosions—a zoo of luminous objects. And while that might sound like a lot of stuff, everything we have ever seen constitutes less than 5% of what’s out there. Nearly 25% of the universe’s content hides in an unknown form: dark matter. Despite decades of effort to detect dark matter, the substance eludes us.Director of Sciences Janna Levin invites physicists Elena Aprile of Columbia and Peter Fisher of MIT to ask if we truly should look for a new fundamental constituent of nature, or could dark matter actually be microscopic black holes?
This project is supported by the Alfred P. Sloan Foundation Program in Public Understanding of Science and Technology, bridging the two cultures of science and the arts.
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