From the tsunami-damaged Fukushima nuclear power plant to the end of NASA"s shuttle program, a great deal of science stories made headlines this year. Science writers Mariette DiChristina, Matt Crenson, Steven Levy, and Paul Raeburn join Ira Flatow to discuss the year's top stories in science.
Three years ago, scientists found plenty of cod in the region but data this season indicates just the opposite. Federal regulators say stocks are at such dangerously low levels, cod fishing might need to be shut down. Fishermen say they don't believe the reports.
Harbor porpoises are showing up in growing numbers under the Golden Gate Bridge. Six decades ago, they were driven away in part by wartime activities and poor water quality; now, researchers are trying to understand why they're returning.
The Kemp's ridley sea turtle, which hopped a ride aboard floating seaweed, made the 4,600 mile journey from the Gulf of Mexico to the shores of Portugal in 2008. Nicknamed Johnny Vasco de Gama, after the Portugese explorer, the now-rehabilitated turtle will be reintroduced into Gulf waters Tuesday.
Damian Scarf at New Zealand's University of Otago reports in the current issue of the journal Science that experiments he conducted with colleagues show that pigeons can learn abstract rules about numbers.
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