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Mars

Comet C/2013 A1 May Hit Mars In 2014 150

Posted by samzenpus
from the big-boom dept.
astroengine writes "According to preliminary orbital prediction models, comet C/2013 A1 will buzz Mars on Oct. 19, 2014. C/2013 A1 was discovered by ace comet-hunter Robert McNaught at the Siding Spring Observatory in New South Wales, Australia, on Jan. 3. When the discovery was made, astronomers at the Catalina Sky Survey in Arizona looked back over their observations to find "prerecovery" images of the comet dating back to Dec. 8, 2012. These observations placed the orbital trajectory of comet C/2013 A1 through Mars orbit on Oct. 19, 2014. Due to uncertainties in the observations — the comet has only been observed for 74 days (so far), so it's difficult for astronomers to forecast the comet's precise location in 20 months time — comet C/2013 A1 may fly past at a very safe distance of 0.008 AU (650,000 miles). But to the other extreme, its orbital pass could put Mars directly in its path."
Stats

We Aren't the World: Why Americans Make Bad Study Subjects 450

Posted by samzenpus
from the we-are-the-outliers dept.
Lasrick writes "This is just fascinating: Joe Henrich and his colleagues are shaking the foundations of psychology and economics, and explain why social science studies of Westerners — and Americans in particular — don't really tell us about the human condition: 'Given the data, they concluded that social scientists could not possibly have picked a worse population from which to draw broad generalizations. Researchers had been doing the equivalent of studying penguins while believing that they were learning insights applicable to all birds.'"
Crime

Fingerprint Purchasing Technology Ensures Buyer Has a Pulse 156

Posted by samzenpus
from the no-zombie-shopping dept.
An anonymous reader writes "A small U.S. university has come up with a novel solution to reduce the possibility of using a dead person's hand to get past a fingerprint scanner through the use of hemoglobin detection. The device quickly checks the fingerprint and hemoglobin 'non-intrusively' to verify the identity and whether the individual is alive. This field of research is called Biocryptology and seeks to ensure that biometric security devices can't be easily bypassed."
Earth

Long-Lost Continent Found Under the Indian Ocean 168

Posted by samzenpus
from the calling-Cthulhu dept.
ananyo writes "The drowned remnants of an ancient micro-continent may lie scattered beneath the waters between Madagascar and India, a new study suggests. Evidence for the long-lost land comes from Mauritius, a volcanic island about 900 kilometers east of Madagascar (abstract) The oldest volcanic rocks on the island date to about 8.9 million years ago. Yet grain-by-grain analyses of beach sand collected at two sites on the Mauritian coast revealed around 20 zircons — tiny crystals of zirconium silicate that are exceedingly resistant to erosion or chemical change — that were far older. One of these zircons was at least 1.97 billion years old. The researchers that made the discovery think that geologically recent volcanic eruptions brought shards of the buried continent to the Earth's surface, where the zircons eroded from their parent rocks to pepper the island's sands. Analyses of Earth's gravitational field reveal several broad areas where sea-floor crust at the bottom of the Indian ocean is much thicker than normal — at least 25 to 30 kilometers thick, rather than the normal 5 to 10 kilometers. Those crustal anomalies may be the remains of a landmass that researchers have now dubbed Mauritia, which they suggest split from Madagascar when tectonic rifting and sea-floor spreading sent the Indian subcontinent surging northeast millions of years ago."
News

How Close Is Iran, Really, To Nuclear Weapons 299

Posted by samzenpus
from the big-boom dept.
Lasrick writes "A Reuters blog post by Yousaf Butt explains the science, or lack thereof, behind recent claims that Iran is closer to building the bomb. Butt has been writing in the Bulletin of the Atomic Scientists, most recently blasting the unsourced AP 'Iranian graph' that claimed to show nuclear testing activity as well as the Washington Post story about Iran's alleged order of 100,000 magnets for their centrifuges."

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