The solar wind, explained
First proposed in the 1950s by UChicago physicist Eugene Parker, the solar wind is a flow of particles that comes off the sun at about one million miles an hour.
The Doomsday Clock, explained
The Doomsday Clock is a symbol that represents how close humanity is to self-destruction. The clock hands are set annually by the Bulletin of the Atomic Scientists, a group formed by Manhattan Project scientists at UChicago after World War II.