AOL.com Video - 1200-Year-Old Mystery Linked to a Cosmic Bang

VIDEO:Knowledge

1200-Year-Old Mystery Linked to a Cosmic Bang

Description:A powerful explosion in space that scientists think happened between the year 774 and 775 AD may have left evidence on Earth. Tree rings of ancient cedars in Japan and ice deposits in Antarctica both show signs of rare isotopes that are created by heightened levels of radiation. Some researchers think these are linked to a gamma ray burst that happened in our galaxy around this time. (1:08)

Source: GeoBeats

Tags: 1200-Year-Old Mystery Linked to a Cosmic Bang , gamma ray bursts , gamma ray facts , GeoBeats