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National Academy of Sciences

Vision risks for astronauts could be a Mars mission 'showstopper,' NASA scientist says

Mars may possess a stark and austere beauty, but a manned Red Planet mission will likely not be easy on the eyes.Recently, scientists have begun realizing that spaceflight can cause serious and perhaps permanent vision problems in astronauts . NASA researchers are working hard to understand the issue, which could present a major hurdle to mounting manned missions to Mars and other faraway destinations."This is one that we don't yet have a good handle on, and it can be a showstopper," Mark Shelhamer, chief scientist for the NASA Human Research Program at Johnson Space Center in Houston, said last week during a presentation with the agency's Future In-Space Operations (FISO) working group. [ The Human Body in Space: 6 Weird Facts ]Another peril of microgravityThe human body suffers in the microgravity environment of space. For example, without effective countermeasures — i.e., vigorous weight-bearing exercise — astronauts' muscles atrophy and their bones shed calcium, becoming more and m...

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  1. Professor cooks up recipe for turning wood chips into food

    Would you like wood chips with that?Someday, restaurants will serve wood chips the same way they now serve mashed potatoes and grits. Also on the menu will be corn s...

  2. Simple paper urine test may detect cancer, blood clots

    Similar to a pregnancy test, a simple paper strip urine test may help indicate the presence of cancerous tumors and blood clots in the body, New Scientist reported.I...

  3. Los chinos no están más contentos a pesar del crecimiento económico

    La economía de China ha crecido casi un 550 por ciento en las últimas dos décadas pero su población no está más satisfecha por eso y existe un disgusto creciente por...

  4. GlassesOff app claims to eliminate need for reading glasses

    Like death and taxes, reading glasses can seem almost inevitable -- perhaps until now.A new app called GlassesOff claims to be able to improve your vision, eliminati...

  5. Time to ditch private oversight of America's electric grid system

    In April of 2013, unknown parties used a high-powered rifle to shoot out seventeen transformers at a San Jose substation—but only after cutting the fiber optic cable...

  6. Un crecimiento más lento de la población ayudará a controlar el cambio climático

    Un crecimiento más lento de la población puede ayudar a que los países reduzcan casi un 30% las emisiones de gases que contribuyen al calentamiento atmosférico, segú...

  7. Overnight shift, jet lag cause ‘chaos’ in body

    Working overnight causes “chaos” in the body and could lead to long-term damage, BBC News reported.In a study published in Proceedings of the National Academy of Sci...

  8. Men: Get your calcium from food, not pills

    Women are told to take a calcium supplement following menopause to stave off rapid bone loss that can lead to osteoporosis. Men lose bone as they age too, but most d...

  9. Reptile death match: Snake devours crocodile

    A python was caught on camera devouring a crocodile after an epic battle on the shores of an Australian lake.Amazing footage of the incident shows the snake constric...

  10. China pollution wafting across Pacific to blanket US, report shows

    Pollution from China travels in large quantities across the Pacific Ocean to the United States, a new study has found, making environmental and health problems unexp...

  11. Debate over climate change gets heated

    This is a rush transcript from "Special Report," February 14, 2014. This copy may not be in its final form and may be updated.(BEGIN VIDEO CLIP)JAY CARNEY, WHITE HOU...

  12. Debate over climate change gets heated

    Reaction from the 'Special Report' All-Star panel

  1. Pollution from Asia strengthening storms in North America, study finds

    Pollution from China's coal-burning power plants is pumping up winter storms over the northwest Pacific Ocean and changing North America's weather, a new study finds...

  2. Low blood sugar may cause couples to fight more

    A quick candy bar may stave off more than hunger. It could prevent major fights between husbands and wives, at least if a new study that used voodoo dolls is right.T...

  3. Microbes may have caused Earth's biggest extinction

    A microbial feeding frenzy may have fueled the biggest mass extinction in Earth's history, new research suggests.The findings suggest that bacteria, with a little he...

  4. People use more facial expressions than thought, study says

    When you're feeling one of those combination emotions, like sadly angry or happily disgusted, it shows on your face in a unique way, a new study shows.In fact, there...

  5. Erasing bad memories: Wiping out unconscious traces is possible

    Bad memories are not only part of our conscious mind, they also leave a trace in our unconscious. But now, new research shows that actively trying to forget an unwan...

  6. Climate change: Conditions worse for Dems than in 2010

    **Want FOX News First in your inbox every day? Sign up here .**Buzz Cut: • Climate change: Conditions worse for Dems than in 2010 • Sink, sank, sunk • First in FNF: ...

  7. Genghis Khan owes his empire to ... rain, says study

    Scientists who study tree rings for a living have discovered that central Mongolia had an usually warm and wet spell from 1211 to 1225. This would probably remain of...

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