Columbia University urban designer Mitchell Joachim talks about designing an environmentally friendly city from scratch. "Location is everything," he says.
NASA astronomer Drake Deming talks about using brightness detectors similar to those on digital cameras to help in the hunt for Earth-like planets around other stars.
Erica Bree Rosenblum, a biologist at the University of Idaho, is working to understand a mysterious fungus, found nearly every continent, that's affectog more than 400 frog species.
Shell scientist Willem Schulte says advanced oil recovery technology could help us access vast amounts of oil that remain trapped underground. Read about squeezing more oil out of reserves.
Cars of the future: It one runs over a pothole, it can tell nearby vehicles to avoid it. Or it can send a message to a municipal grid to come and repair the pothole.
A cuppa hope: Some of the smartest people in the world are working hard every day to solve the difficult issues facing us at the beginning of the 21st century.
Thomas Dame said that new Milky Way arm recently discovered gives our galaxy "a beautiful bi-symmetric symmetry, like a seesaw, like a butterfly's wings."