Is Quantum Theory About Reality or What We Know?
Physicists know how to use quantum theory—your phone and computer give plenty of evidence of that. But knowing how to use it is a far cry from fully understanding the world the theory describes—or even what the various mathematical devices scientists use in the theory are supposed to mean.
Darwin’s Lost Beetle Is Back
It’s difficult to overstate the importance of finding an original Darwin specimen, collected during the Beagle’s first voyage. But finding it, and realizing it was a lost specimen collected by Darwin, was just the first step in a much longer journey.
Physics Has Demoted Mass
Modern physics has taught us that mass is not an intrinsic property.