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Long before a woman feels an ominous lump in her breast, Victoria Seewaldt, M.D., can test her for subtle signs that breast cancer may be brewing in a few errant cells amidst thousands of healthy ones. Never before has such a possibility existed, and Seewaldt is brimming with excitement.
“This is potentially the ’breast pap smear’ that we never had before,” said Seewaldt, a scientist and breast oncologist at the Duke Comprehensive Cancer Center. “Just as we do with a cervical pap
Early life may have lived very differently than life today
As two rovers scour Mars for signs of water and the precursors of life, geochemists have uncovered evidence that Earth’s ancient oceans were much different from today’s. The research, published in this week’s issue of the journal Science, cites new data that shows that Earth’s life-giving oceans contained less oxygen than today’s and could have been nearly devoid of oxygen for a billion years longer than previously thought. T
A balloon-shaped robot explorer that one day could search for water on other planets has survived some of the most trying conditions on planet Earth during a 70-kilometer (40-mile), wind-driven trek across Antarctica.
The Tumbleweed Rover, which is being developed at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, Calif., left the National Science Foundation’s Amundsen-Scott South Pole Station on Jan. 24, completing its roll across Antarctica’s polar plateau roughly eight
A drug widely used to prevent nausea and other side effects in patients receiving chemotherapy for breast cancer may also, unfortunately, prevent the therapy from working efficiently on tumor cells, researchers from the University of Chicago report in the March 1 issue of the Journal, Cancer Research.
Dexamethasone, a synthetic steroid, is routinely given to women just before they receive chemotherapy with either paclitaxel or doxorubicin, two drugs commonly used to treat breast cancer. In
Astronomers at the University of California, Berkeley, have discovered the nearest and youngest star with a visible disk of dust that may be a nursery for planets.
The dim red dwarf star is a mere 33 light years away, close enough that the Hubble Space Telescope or ground-based telescopes with adaptive optics to sharpen the image should be able to see whether the dust disk contains clumps of matter that might turn into planets.
“Circumstellar disks are signposts for planet formati
Before humans can leave their boot prints on the dusty surface of Mars, many questions have to be answered and many problems solved. One of the most fundamental questions – one that has intrigued humankind for centuries – is whether life has ever existed on Mars, the most Earthlike of all the planets.
Through its long-term Aurora Programme of solar system exploration, ESA is already preparing a series of robotic missions that will reveal the Red Planet’s secrets and pave the way for a human