On: New asteroid strike images show impact 'a lot bigg...

[chiefalchemist]

Questions: are all asteroids relatively the same in composition, density, etc.?

[ncmncm → chiefalchemist]

No. Like asking if all animals are about like a dog.

All animals need calories and B-12. Other details vary.

Many animals have arranged to grow internal bacterial colonies for B-12. A very few get calories from sunlight.

[chiefalchemist → ncmncm]

Thanks. But the animal analogy was heavy-handed and unnecessary.

The gist was, we've crashed into a single asteroid. There are zero conclusions we can draw from that sample size. So "a lot bigger" just means someone didn't consider the true range of possibilities.