00:00A single impossible radio burst screamed from deep space.
00:04This strange signal lasted 72 seconds exactly.
00:07It hit Earth on a special frequency.
00:10That frequency, 1420 megahertz, is hydrogen's cosmic hello.
00:14It's a universal beacon.
00:16Its incredibly narrow bandwidth and intense transient nature
00:19defied no natural cosmic phenomena.
00:22Was this impossible radio burst from aliens?
00:25Find out more at the Lincoln Bio.
