[Kryptid]

1. Sea-living dinosaurs adapt to life on land;
2. Evolve into land-living mammals;

Mammals didn't evolve from dinosaurs. Dinosaurs and mammals are cousins, both having evolved from reptiles.

[evan_au]

how come the pizza oven didn't fry all the vegetation too?

I think it probably did.... That thin black line in the geological record is not 100% Iridium!

Seeds and tubers can survive in the ground.
- Some animals squirrel away seeds underground
- Seeds falling in ponds would be protected from the most extreme temperatures

[Origin]

Would you tell the world if you knew an asteroid was coming to Earth?

Heck no, that would ruin the surprise!

[Eternal Student]

Some interesting answers already given.
The correct answer is always no, don't tell the whole world, just an appropriate organisation...  That I have found an Asteroid isn't enough,  this needs verification from others and independent observatories.  I could be seeing a small bug that was crawling over the front of my telescope,  or it could just be my mama calling me in for dinner.

[Bored chemist]

I'm intrigued by the idea that, if I told people about it, they would listen to me.

[Eternal Student]

I'm intrigued by the idea that, if I told people about it, they would listen to me.

     

[Petrochemicals]

We are not mindless dinosaurs,

Dinosaurs were far from mindless. They survived in all sorts of environments for about 170,000,000 years and learned to swim, burrow and fly. The big guys even had two brains, making them four times as intelligent as a politician.

The odd thing about their extinction was its completeness. Land animals (including humans) clearly cannot survive major climate change because their environments are not robust and food may disappear quicker than the animals can migrate. But sea creatures can migrate continuously and the ocean environment and ecology are robust and change very slowly. Sharks survived, so we must assume that their prey fish also were not much affected by the dinosaur extinction event. So why did the ocean dinosaurs also die out?     

Survival of the fittest Alan, simpler lifeforms have the advantage, niche specialists get eradicated. Maybe the dinosaurs where allergic to iridium.

[Colin2B]

I'm intrigued by the idea that, if I told people about it, they would listen to me.

Just post it on a conspiracy site claiming that NASA is covering up the truth that the planet will be destroyed. Surprising how many people will believe you.