via https://ift.tt/zqxgQs1 A dark, merciless extinction.

For two particularly harsh years after the dinosaur-killing asteroid slammed into Earth, the world darkened and temperatures plummeted.

Ultimately, the food web collapsed, wiping out starved terrestrial dinosaurs.

New research, published in the science journal Nature Geoscience, reveals a detailed view of what … Scientists reveal deadly Earth just after the dinosaur asteroid hit