News

Animals

Climate change could threaten monarch mass migration

Suitable milkweed habitat in Mexico may shift south, fracturing existing migration routes and possibly pushing some butterflies to stay put.

Earth

Metal pollution from a rocket reentry detected for the first time

Direct detection of lithium from a SpaceX rocket reentry offers new evidence that metal pollution from space debris could threaten the ozone layer.

Physics

Here’s why sneakers squeak on the basketball court

Tiny, repeating detachments between sole and floor — thousands of times a second — create the distinctive squeak heard on the court, data show.

Animals

Keeping a beat wins caterpillars friends in low places

Finding a caterpillar with rhythm was “mind-blowing,” suggesting it might be a more widespread part of animal communication than thought.