Geologist Marcia Bjornerud has a profound understanding of Earth's deep history. The author of "Timefulness," she says geologic literacy would give us a much healthier sense of time. 

In the years when psychedelic science had been shut down, Amanda Feilding helped jump-start research into altered states of mind. Today, she's in her 80s and remains active in psychedelic research with her Beckley Foundation.