What did donald c. johanson and tom gray discover in 1974?

What was charles townshends development of a crop rotation system important to the industrial revelotion

Why did trade along the silk road increase after it fell under mongol control? o people stopped using camels the mongols paved the road o it became safer to travel the mongols were better traders next question ask for

The senate differs from the house of representatives in that representatives serve for terms, while senators serve terms. question 18 options: six year, four year four year, six year two year, six year six year, two year