I love thinking about things I can’t see with just my eyes. Like the atoms that make up everything. I asked my friend Fred Gittes how to figure out the number of atoms in a leaf. He’s a physicist at ...

Physicists have built the most accurate clock ever: one that gains or loses only one second every 40 billion years 1. Alexander Aeppli at the research institute JILA in Boulder, Colorado, and his ...

A cloud of atoms with a temperature beyond absolute zero – which is also bizarrely hotter than any positive temperature imaginable – could be a mysterious new quantum state of matter. Luca Donini at ...

In a new study, physicists at the University of Colorado Boulder have used a cloud of atoms chilled down to incredibly cold temperatures to simultaneously measure acceleration in three dimensions—a ...