NYT > Science

Trilobites: How Layers in a Latte Form
A retired engineer’s accident while making a coffee drink spurred fluid dynamics researchers to study how espresso and milk arrange themselves in a glass.
A Glimpse of Oumuamua
Astronomers have discovered a passing rock from another star — the first interstellar asteroid.
Q&A: The Sands of Time
The depth of sand on a beach can vary considerably from location to location. Human intervention often doesn’t last for long.