Gamma Ray Burst ( GRB ) is scared than super flare from The Sun. Ground lives will be dead by this irradiation only for 10 milliseconds to several hours. It is suggested one of Mass extinction would be occurred by this attack ( O-S boundary ). Because THEY will do it whatever it will be able to occur, we must beware of.
But fortunately, there is no star which can cause Gamma Ray Burst immediately.
In exact, THEIR main target is supposed Sirius ( Sirius A ). THEY would aim the collision between white dwarfs after Sirius A will explode. It is supposed 1,000,000,000 years after and more. It is not certain whether this collision would occur, Sirius-A will become as like small η Carinae at that time.
THEY are the men who deal too slow business anyway.
May The Earth in peace.
