June 21, ca. 2500 BCE: Summering at Stonehenge

Stonehenge, the infamous stone circle on Salisbury Plain, U.K., dates to around 2500 B.C.E. The monument is aligned so that if you are standing at the center of the ring on the summer soltice (which can be June 20, 21, or 22), the Sun rises over the Heel Stone; solstice […]

A look at Jane Street’s push to supercharge trading with AI and become a major AI investor; it invested $1B in CoreWeave in April and has a stake in Anthropic (Gregory Zuckerman/Wall Street Journal)

Gregory Zuckerman / Wall Street Journal: A look at Jane Street’s push to supercharge trading with AI and become a major AI investor; it invested $1B in CoreWeave in April and has a stake in Anthropic  —  The firm has surged from a handful of staffers to 3,500 with plans […]