Well do you mean , the iridium that ' s in abundance in the KT boundary layer , or do you mean 12 , 000 yrs ago ? They mention nuclear diamonds , nanodiamonds , trinitite , core samples , mass floodings , that show clear evidence of impacts two times 12 , 900 yrs ago and around 11 , 600 yrs ago . And to me , its makes more sense that earth has had fives mass extinctions and they are linked to climate change or other natural causes other than humans . Humans weren ' t even around 200 millions years ago but all 99 % of those animals are gone . still humans ? <| sep |> Any fucking team looks like the best defense in the league to us . <| sep |> overunder 2 minutes on the national anthem <| sep |> Damn she stung the hell out of that treadmill with her tail .