Even though the concurrence of the end-Cretaceous extinctions with the Chicxulub asteroid impression strongly supports the effect speculation, some researchers continue to support other contributing results in: volcanic eruptions, weather change, sea stage alter, and other impression functions. Determined by scientific studies at Seymour Island in Antarctica, Sierra Petersen and http://pg19641.59bloggers.com/8606224/not-known-facts-about-click-this-over-here-now