- NASA's focus shifting to earth
President Obama's controversial decision to change NASA's course on manned space exploration puts more focus on earth science and biomedical projects. Even some who agree study of climate change is important say it's tough to replace manned missions.9:06 a.m.
Mark Serreze: Director of the National Snow and Ice Data Center.
Rick Tumlinson: Co-founder of the Space Frontier Foundation.
- Summit focuses on limiting nukes
A summit involving more than 40 countries including China, India and Russia takes up the problem of keeping track of material that could be used to make a nuclear weapon. The summit in Washington also attempts to figure out how to keep countries that do not currently have nuclear weapons from producing them. Two of those countries, North Korea and Iran, are not at the summit. And Israel has decided to skip the summit, rather than face criticism for not signing the nonproliferation treaty.9:37 a.m.
Corey Hinderstein: Vice president for international programs at the Nuclear Threat Initiative.
David Hoffman: Contributing editor at the Washington Post and author of "The Dead Hand: The Untold Story of the Cold War Arms Race and Its Dangerous Legacy." He's the former assistant managing editor for foreign news at the Washington Post.
- The true nature of genius
Conventional wisdom tells us that talent and high intelligence are rare gems that are genetically scattered throughout the population. But author David Shenk argues that the new science of human potential suggests otherwise.10:06 a.m.
David Shenk: Author of "The Genius in All of Us." His previous books include "The Forgetting" and "Data Smog."
You can follow Kerri Miller on Twitter at @KerriMPR
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