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The seven men arrested in Britain over the weekend were allegedly manufacturing Ricin, a poison made from the berries of a common ornamental plant. NPR's Ketzel Levine looks at the plant itself.

The science journalist who agreed to vet the claim that a cloned baby has been born is backing out. Michael Guillen says Clonaid has not given provided any access to the alleged clone. NPR's Joe Palca has the story.

For the first time in 30 years, streams and wetlands throughout the United States could lose Clean Water Act protections under a proposal expected this week from the Bush administration. NPR’s John Nielsen reports.

The Grateful Dead began their musical journey in 1965, and continued to perform before sell-out crowds until their breakup in 1995. NPR's Scott Simon talks with the band's historian Dennis McNally about his book, A Long Strange Trip: The Inside History of the Grateful Dead.

In swamps and wetlands all over the South, fat, furry rodents called nutria -- a beaver-like animal native to Argentina -- are devouring small plants and sparking huge erosion problems. NPR's Melanie Peeples meets with some Louisiana trappers who earn $4 from the state government for each nutria they kill.

A company with ties to a religious group that believes space aliens brought life to Earth announces the birth of the first human clone. But Clonaid offers no proof that the 7-pound baby girl is a genetic copy of her 31-year-old mother. Most scientists are skeptical. NPR News reports.

"Amazing Grace" has become a pop, folk and gospel standard since Englishman John Newton, a slave trader-turned-abolitionist, wrote the words in the 1700s. NPR's Liane Hansen talks with Steve Turner about his new book and the song's remarkable history.

Hot Tuna began as a side project for Jefferson Airplane musicians Jack Casady and Jorma Kaukonen. Long after the band that made them famous broke up, Hot Tuna is still touring. Casady and Kaukonen talk with Morning Edition host Bob Edwards and play their signature folk-and-blues tunes. Exclusive to npr.org, hear full-length cuts of three songs, recorded live in Studio 4A.

With the new year, new federal rules require every U.S. airport to screen all checked luggage for explosives. The new regulations mean travelers will need to re-think how they pack. Hear NPR's Janet Babin and Jonathan Proctor, editor of Airliners magazine.

A Clonaid official backpedals on providing evidence of the company's claim that a cloned infant has been born. Clonaid's CEO says the mother of the child born Dec. 26 is wavering on providing a DNA sample key to establishing genetic proof. Scientists remain skeptical of Clonaid's claim. Hear from NPR's Joe Palca and James Randi, who is devoted to debunking pseudoscientific claims.