Tools in the middle stone age were smaller and more complex than tools in the early stone age. which of the following statements supports this fact?

In order from largest to smallest what are earths five main oceans

What border separates sonora and chihuahua national border state border physical boundary natural boundary

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?