"I wonder what happened to "Not if but, when"?
They just switched it to the asteroid that's gonna get us next month ;~)
You mean the one that's gonna hit earth on the 25th of May?
Everything about that idea is kooky except passing through the comet trail. A swarm of comet fragment impacts is believed to have ushered in the The Dark Ages.
"Astronomers unravel a mystery of the Dark Ages Undergraduates' work blames comet for 6th-century "nuclear winter" Scientists at Cardiff University, UK, believe they have discovered the cause of crop failures and summer frosts some 1,500 years ago a comet colliding with Earth. The team has been studying evidence from tree rings, which suggests that the Earth underwent a series of very cold summers around 536-540 AD, indicating an effect rather like a nuclear winter."