Researchers in the Great Lakes are trying to control an ancient fish, the sea lamprey. The species is notorious for latching onto other fish and literally sucking the life out of them. The lamprey larvae can be killed with a special poison, and now one biologist thinks he's found a way to make sure they're in the right place at the right time to die.
And now to an issue that lawmakers are not spending a lot of time debating: climate change. Tomorrow, President Obama will lay out a strategy to address the problem, using executive powers. It's an admission that's sweeping climate legislation stands little chance of passing Congress as NPR's Jennifer Ludden reports.
JENNIFER LUDDEN, BYLINE: Aides say Mr. Obama's plan includes limiting carbon dioxide emissions from power plants. The reaction from House Speaker John Boehner was blunt.
It used to be that if astronomers wanted to get rid of the blurring effects of the atmosphere, they had to put their telescopes in space. But a technology called adaptive optics has changed all that.
Adaptive optics systems use computers to analyze the light coming from a star, and then compensate for changes wrought by the atmosphere, using mirrors that can change their shapes up to 1,000 times per second. The result: To anyone on Earth peering through the telescope, the star looks like the single point of light it really is.
Tawny crazy ants are invading ecosystems and homes in states including Texas and Florida, wiping out other ant species and overwhelming homeowners. Weekend Edition Saturday host Scott Simon talks to Texas A&M research scientist Robert Puckett, who says the ants are "ecological steamrollers" that reproduce so fast they are nearly impossible to get rid of.
I think we're starting to see some sort of conflict between law and values, on the one hand, and technology, on the other. The conflict is unfolding in connection with the law surrounding privacy and protection from undue government and corporate surveillance.