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27 November 2013 12:59 pm ,
Vol. 342 ,
Science has exposed a thriving academic black market in China involving shady agencies, corrupt scientists, and...
Paper-selling agencies flourish in the aura of reputable businesses. For some scientists, it may be difficult to tell...
The new head of the National Center for Science Education promises to "fight the good fight" against attacks on...
Analyses of the H7N9 strains isolated from four new cases show that the virus is evolving rapidly, heightening anxiety...
In 2009, Jack Szostak shared a Nobel Prize for his part in discovering the role of telomeres, the end bits of...
Featuring the first lunar rover in 40 years, Chang'e-3 is seen as an important milestone on China's quest to send a...
Data collected by satellites and floating probes have chronicled a 2-decade rise in the temperature and thickness of a...
Cholesterol, the artery-clogging molecule that contributes to cardiovascular disease, has another nasty trick up its...
- 27 November 2013 12:59 pm , Vol. 342 , #6162
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ScienceShot: Sea Turtles Smell Nearby Shores
1 November 2013 12:45 pm
A loggerhead sea turtle’s nose knows land. Sea turtles can migrate across the ocean and back, but while Earth’s magnetic field plays a role in their navigation, researchers have wondered what other tools turtles use to find safe harbor, particularly at smaller scales. Loggerheads’ (Caretta caretta, pictured) olfactory systems can sense airborne odors, including food—could they sniff out nearby shores as well? To find out, researchers piped the scent of either distilled water or mud from North Carolina’s Sage Bay into the air above a juvenile loggerhead at swim in an arena. Researchers report in this month’s issue of Marine Biology that when the scent of mud was in the air, the 10 turtles spent more time swimming with their heads above the water’s surface, compared with when distilled water was the only perfume. (An additional series of tests checked turtles’ responses to fragrances including jasmine, lemon, and cinnamon against the mud—mud was still what drew turtles to the surface, suggesting that they weren’t merely responding to any new scent.) Researchers say these turtles’ ability to smell land, shown for the first time in this study, could help the reptiles find the shore, draw them to food along the shoreline, or both.