Celebrate the International Day of Light on May 16, 2020
Jason Socrates Bardi, Editor
Laser spacecraft would redirect objects away from a collision course with Earth.
Charles Q. Choi, Contributor
New technique uses the "Doppler effect" to detect abnormal blood flow.
Peter Gwynne, Contributor
What if scientists could make it rain?
Marsha Lewis, Contributing Producer
Rudimentary technology gets an update.
Katharine Gammon, Contributor
Beam's brief duration could help scientists glimpse the atomic world.
Thomas Sumner, Contributor
A laser that produces intervals of nothingness needs a job.
Phil Schewe, Contributor
Lasers have come a long way since the earliest focused light beams were created.
Mike Lucibella, Contributor