Astrolight CEO Laurynas Mačiulis explains how laser satellite communication could ease spectrum congestion, increase data capacity, and raise new engineering and policy questions for space infrastructure.

Satellites and rocket stages burning up on reentry are now depositing more aluminum into Earth’s upper atmosphere than natural meteoroids, crossing a threshold that atmospheric scientists have warned about for years.

Satellite data shows rivers rise and fall less than expected while revealing hidden riverbed shapes and new clues about Earth’s water cycle.