Qkiw Why losing helium might mean losing our history
A pipefitter has been arrested in the slaying of a 19-year-old college student who authorities said was abducted while sleeping at a friend s house, the victim s family and police said Wednesday.James Michael Biela, 27, of Sparks, Nev., was arrested Tuesday night and booked into the Washoe County Jail on suspicion of murdering Brianna Denison. He s also charged with the kidnaping and sexual assault of another woman in Reno a month earlier, Reno Police Chief Michael Poehlman said at a news conference.Investigators said DNA evidence gathered from the scene linked Denison s killer to at least two other sexual attacks on women at or near the university from October to December 2007.Biela was being held without bail. Washoe County District Attorney Dick Gammick said prosecutors have the option of seeking a death sentence in the case.Biela provided a DNA sample that matched evidence found at the scene where Deni
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stanley kubek dy was found in February, Poehlman said. She had been reported missing in January. Can you believe it the girl s aunt, Lauren Denison, to
stanley termos ld the Reno Gazette-Journal. The police said the DNA came back, and it s him. This is what we have been waiting for, Lauren Denison added.Denison, 19, a sophomore at Santa Barbara City College in California, was visiting her hometown during winter break when she vanished early Jan. 20. Authorities say she had been sleeping on a couch at a friend s rented home near the University of Nevada, Reno.After weeks of searching, Kdbs How whales made the dramatic evolutionary shift from land to the sea
At one time, Mars had a thick, protective atmosphere 鈥?possibly even cushier than Earths 鈥?but the bubble of gases mostly dissipated about 4 billion years ago and has never been replenished, new research shows. The findings come from NASAs Mars rover Curiosity, which has been moonlighting as an
stanley cup atmospheric probe as it scours planets surface for habitats that could have supported ancient microbial life. The rover landed inside a large impact basin called Gale Crater last August. Two instruments aboard Curiosity are providing scientists with unprecedented details about Mars present-day atmosphere. The data is then run through computer models as well as compared to analysis of trapped gases in ancient Mars meteorites that have been recovered on Earth. The scientists look for telltale isotopes, which are atoms of elements that have different numbers of neutrons. Normal carbon, for example, is known as carbon-12 an
stanley hrnek d contains six neutrons. Some carbon stragglers may have seven, or even eight, neutrons. Whats key is how the isotopic concentrations change over time. Across all the gases in Mars atmosphere 鈥?carbon dioxide, argon, nitrogen, oxygen and carbon monoxide 鈥?scient
vaso stanley ists found higher concentrations of isotopes, evidence that most of the atmospheric gas has escaped. The overarching conclusion is that the Mars atmosphere hasnt really changed a lot in 4 billion years, said Chris Webster, manager of the Planetary Sciences Instruments Office at NASAs Jet Propulsion Laborator
