What landforms did the early people settle down by?

What is the famous rainforest in costa rica called?

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

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?