Edwin hubble was the first to suggest that the universe is expanding. we can verify his theory by observing the
of distant stars and galaxies.

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth