Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...
From gamma ray bursts and supernova explosions to black holes and unknown alien life, we rank the scariest things in the ...
When a massive star collapses into a rapidly spinning black hole, it can release twin jets of gamma radiation so powerful they briefly outshine entire galaxies. These events, known as gamma-ray bursts ...