Metamaterials as a class get a lot of press for their ability to exhibit a negative refraction index, the characteristic that lets them bend light around a space or object (the much ballyhooed "invisibility cloak"). But designer metamaterials have potential reaching far beyond just visible light.
Let the young rebuild Japan, says Yasuteru Yamada, but let the old clean up the most difficult mess leftover from March's devastating earthquake and tsunamis. The 72-year-old former engineer is recruiting other retirees to replace the younger workers currently braving radiation exposure at Japan's damaged Fukushima nuclear power complex. It's not a question of bravery or experience, he says, but one of biological logic.
Japanese authorities are considering harvesting bone marrow from workers at the stricken Fukushima nuclear power plant, hoping an infusion of their own healthy cells could save their lives if they’re exposed to dangerous radiation levels.
Ionizing radiation—the kind that minerals, atom bombs and nuclear reactors emit—does one main thing to the human body: it weakens and breaks up DNA, either damaging cells enough to kill them or causing them to mutate in ways that may eventually lead to cancer.
A powerful NASA-developed grow lamp designed for the space shuttle can ease a debilitating side effect of cancer treatment, according to a new study. That’s directly from the lamp itself, not because it is used to grow medicinal plants. The treatment is under review by the Food and Drug Administration.
Studies on the impact of wireless radiation on humans are endlesslyinconclusive, but a recent study on the effects of Wi-Fi radiation on trees--yes, trees--indicates that our woody friends may be much more vulnerable than we are.
At the heart of M87, the Virgo A galaxy, is one of the biggest black holes ever seen — about 6 billion times more massive than the sun. Scientists working with the Chandra X-ray telescope and the Very Large Array have compiled this nice new image of its insatiable appetite in action.
By Alessandra CalderinPosted 07.19.2010 at 10:11 am 16 Comments
Of all the bodies in our solar system, the sun is probably the one we want to give the widest berth. It gushes radiation, and even though its surface is the coolest part of the star, it burns at about 9,940°F, hot enough to incinerate just about any material. As such, there are no plans to send a manned mission in its direction anytime soon (Mars is much more interesting, anyway), but it can't hurt to figure out at what distance a person would want to turn back. You can get surprisingly close.
A satellite that will help scientists understand the solar system's largest planet is being outfitted with some special interplanetary armor.
The Juno spacecraft will study Jupiter's powerful radiation belt, but it has to be built to survive that radiation. Engineers recently added a special shield around the spacecraft's electronics, turning it into a Jovian armored tank, says its principal investigator, Scott Bolton, based at Southwest Research Institute in San Antonio.