Where and when the Covid-19 pandemic began — in Wuhan, China in late 2019 — is well known. How it began is a matter of heated controversy. There are two competing hypotheses, one of which is hindering ...

What if everything we know about the world is just a simulation? This thought-provoking question has been at the center of the Simulation Theory, a concept that has become increasingly popular in ...

Piller is an investigative journalist for Science. In November 2022, Dennis Selkoe, a Harvard professor of neurologic diseases and among the most celebrated and prolific Alzheimer’s researchers, ...