CNBC's Jim Cramer on Wednesday told investors there will be a shift in Wall Street's focus, from the actions of the Federal Reserve to those of President Donald Trump. "We're now looking at the changing of the guard from Powell to Trump," he said. "It won't be easy, as one's a pretty predictable guy and the other's a wild card."

Just over 50 years ago, paleontologist Donald Johnson unearthed the remains of "Lucy," an ancient human relative who lived more than 3 million years ago. Now, another group of scientists have found new clues about what life was like in Lucy's time, including the surprising discovery of early tools dating back three million years.