[Mrs. Don-o]

Educate me. What do you mean by “before K2”? Is this a reference to the tectonic events that formed the K2 peak and the Himalayan range?

[JohnnyP]

K-T boundary, I think. When the meteor crashed into Yucatan.

http://www.ucmp.berkeley.edu/education/events/cowen1b.html

[patton]

KT, sorry. Dyslexic typist.