Inversion Principle

Greater You Are, Harder You Fall
The Age of Dinosaurs ended roughly 65 million years ago with the K-T or Cretaceous-Tertiary extinction event, which killed off all dinosaurs save those that became birds, as well as roughly half of all species on the planet, including pterosaurs. The prime suspect in this ancient murder mystery is an asteroid or comet impact, which left a vast crater at Chicxulub on the coast of Mexico.

A series of colossal volcanic eruptions occurred between 63 million to 67 million years ago. These created the gigantic Deccan Traps lava beds in India, whose original extent may have covered as much as 580,000 square miles (1.5 million square kilometers), or more than twice the area of Texas.
Research suggests the mass extinction happened at or just after the biggest phase of the Deccan eruptions, which spewed 80 percent of the lava found at the Deccan Traps.
Both an impact from space and volcanic eruptions would have injected vast clouds of dust and other emissions into the sky, dramatically altering global climate and triggering die-offs. Double Trouble one might say.
"It's the first time we can directly link the main phase of the Deccan Traps to the mass extinction," said Princeton University paleontologist Gerta Keller.
"Before the mass extinction, most of the foraminifera species were comparatively large, very flamboyant, very specialized, very ornate, with many chambers," Keller explained. These foraminifera were roughly 200 to 350 microns large, or a fifth to a third of a millimeter long.
These showy foraminifera were very specialized for particular ecological niches.
"When the environment changed, as it did around K-T, that prompted their extinction," she added. "The foraminifera that followed were extremely tiny, one-twentieth the size of the species before, with absolutely no ornamentation, just a few chambers." As such, these puny foraminifera serve as very distinct tags of when the K-T extinction event started. (ack: live science.com)
Where foraminifera could adapt heavy dinosaurs could not. Their strength was their undoing.
benny