The article says that it’s based on the odds of black hole emitting GRBs directly at Earth like this one did. So the statement isn’t based on the fact that we haven’t recorded one before, but on the astronomical estimate that it will occur only once every 10,000 years
Understands-Irony t1_je8kn38 wrote
Reply to comment by oicura_geologist in The brightest gamma-ray in human history hit our planet this past Fall by PuzzleheadedOne1428
The article says that it’s based on the odds of black hole emitting GRBs directly at Earth like this one did. So the statement isn’t based on the fact that we haven’t recorded one before, but on the astronomical estimate that it will occur only once every 10,000 years