[kmaitreys]

Why are you assuming couple of asteroids? Life first appeared 3.5 billion years ago. The frequency of an asteroid impact on Earth is ~500,000 years.

[pfdietz]

> The frequency of an asteroid impact on Earth is ~500,000 years.

Surely you could make this figure be anything you want just by scaling up or down the size of an object you call an asteroid. So as stated it's meaningless.

[kmaitreys]

Fair. That number is for a rock of size 1 km.

https://catalina.lpl.arizona.edu/faq/how-often-do-asteroids-...