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In his new book, Lester Brown says the world's food supply is tightening -- and the reasons are many.
Climate change may transform how and where farmers grow the food to feed rising numbers of mouths.
From small-scale nuclear power plants to advanced reactor designs, what's next for the technology of nuclear power?
Ira talks about global sustainability with Lester Brown, head of the Earth Policy Institute.
How closely related are food supplies and the stability of a civilization?
March 22 is World Water Day. In this hour, we'll take a look at the technical and political challenges in providing clean water around the world.
Ira talks with Lester Brown of the Earth Policy Institute about the environmental problems facing the globe, and what can be done to take action to fix them.
Fossil remains of an ancient pregnant whale suggest that the animal gave birth ...
Psychologist Diana Reiss discusses communication and cognition in dolphins.
Biologists are using data tags and a National Geographic Crittercam to study the...
What happens when a dolphin catches a cold? No, it's not a trick question. In th...
Underwater digital tags show humpback whales use bubbles to trap schools of fish...
Humpback whales blow bubbles around schools of fish to concentrate them for easier capture. It's called a bubble net, says David Wiley, research coordinator for Stellwagen Bank National Marine Sanctuary, and it's visible as a ring of bubbles at the surface. Now, with underwater digital tracking tags and custom visualization software, whale researchers can see what the whales are doing underwater when they're bubble-netting.