Dr. Rudolph Tanzi
Ethan Miller/Getty Images

Neuralink, the Elon Musk-funded neuroscience startup, has received approval from the U.S. Food and Drug Administration to implant its next patient with its experimental brain chip. This next operation will seek to fix certain issues that occurred following its first implantation operation.
Y. Audic/CEA

One of the most existentially frightening illnesses ever to be discovered was mad cow disease, a fatal prion-spread illness that appeared in animals in the 1980s and killed over 200 people during the height of the outbreak in the late 1990s. You don’t hear much about mad cow today, but the threat still looms. Here’s…
David Vades Joseph for BI