Where is the great rift valley located?

The larges lakes in the world are found in: asia europe north america south america

Why would the composition of a meteorite resemble the earth's interior?

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?