Severe weather expert Jeff Halverson explores why the USA is such a hotbed for tornadoes.
Lowell Observatory astronomer Nick Moskovitz surveys the number of stars and planets believed to exist in the universe.
Lowell Observatory astronomer Nick Moskovitz expounds on the importance of manned space missions.
Frances Jensen, neurologist and author of "The Teenage Brain," investigates whether adolescents are better at multitasking than adults.
Frances Jensen, neurologist and author of "The Teenage Brain," uncovers the truth about bizarre sleep patterns and fatigue in adolescents.
Frances Jensen, neurologist and author of "The Teenage Brain," offers a revolutionary explanation for risky behavior in adolescents.
