Didn't they (astronomers) discover one just last summer only days before it passed in-between the Earth and the Moon?
I don't think is was an extinction-sized asteroid, but more of a city-killer, like the Russian asteroid from the turn of last century.
I believe they did, hence my statement. Whatever is gonna take out this Earth (Asteroid-wise) ain’t yet been discovered.
It would be a shame if such a city-killer fell on Mecca.