How long does it take to get hypothermia in 30 degree weather

What group has historically made up the largest portion of immigrants in mexico?

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

Agricultural practices in the united states nearly led to the extinction of the peregrine falcon during the 1950s and 60s.