A vast ocean likely covered one-third of the surface of Mars some 3.5 billion years ago, according to a new study conducted by University of Colorado at Boulder scientists.
Heavens
A team has observed in unprecedented detail the processes giving rise to stars and planets in nascent solar systems and discovered a better understanding of the way hydrogen gas from the protoplanetary disk is incorporated into the star.
Many of the most well known comets, including Halley, Hale-Bopp and, most recently, McNaught, may have been born in orbit around other stars, according to a new theory by an international team of astronomers led by a scientist from the Southwest Research Institute (SwRI) in Boulder, Colo.
A team of researchers has developed a method to produce cells that kill tumour cells in the lab and prevent tumours forming in mouse models of cancer. Although the current work is in cells and mouse, if the research transfers to human biology, the new type of cell could be a new source for cell-based anticancer therapies.
The cells were produced by knocking out a single gene essential in the pathways of development of immune cells: the modified cells become a novel type, which the authors call Induced T to Natural Killer Cells (ITNK cells).
Many of the most well known comets in history, including Halley, Hale-Bopp and McNaught, may have been born in orbit around other stars and not the Sun, according to a new study by Queen's University astronomy professor Martin Duncan and an international team of astronomers.
"Anyone who has seen a long tail comet in the night sky may be looking at material from another star," says Professor Duncan.
A population-based study of 2,071 Hodgkin lymphoma (HL) survivors over 15 years has discovered that while many survivors had multiple X-rays and CT scans years after treatment was finished, they often did not receive recommended cancer screening tests.
The National Institute of Standards and Technology (NIST) has been designated by Federal Chief Information Officer Vivek Kundra to accelerate the federal government's secure adoption of cloud computing by leading efforts to develop standards and guidelines in close consultation and collaboration with standards bodies, the private sector, and other stakeholders. Computer science researchers at NIST are working on two complementary efforts to speed the government's quick and secure adoption of cloud computing.
HOUSTON -- (June 10, 2010) – Most of the time, the body's blood-forming (hematopoietic) stem cells remain dormant, with just a few producing blood cells and maintaining a balance among the different types.
NASA has successfully completed a comprehensive pre-shipment review of the Fast, Affordable, Science and Technology Satellite, or FASTSAT, a small, microsatellite class spacecraft bus that will carry six experiment payloads to low-Earth orbit.
WESTCHESTER, IL – Regulations that limit the number of hours worked also should provide guidance for shift start times to maximize workers' sleep opportunity and minimize the risk of on-the-job fatigue, according to a research abstract that will be presented Tuesday, June 8, 2010, in San Antonio, Texas, at SLEEP 2010, the 24th annual meeting of the Associated Professional Sleep Societies LLC.
For more than 25 years, our understanding of terrestrial space weather has been partly based on incorrect assumptions about how nitrogen, the most abundant gas in our atmosphere, reacts when it collides with electrons produced by energetic ultraviolet sunlight and "solar wind."
SALT LAKE CITY—According to a study presented at SNM's 57th Annual Meeting, a new radioisotope generator could enhance images produced by a molecular imaging technique known as positron emission tomography (PET). The generator, in combination with instant synthesis kits that introduce target constituents like peptides to the mix, could be used to produce molecular imaging agents that enhance the range of targeting capabilities in diagnostic scans, providing physicians with a much broader portrait of how biological processes are working and why.
The Earth and Moon were created as the result of a giant collision between two planets the size of Mars and Venus. Until now it was thought to have happened when the solar system was 30 million years old or approx. 4,537 million years ago. But new research from the Niels Bohr Institute shows that the Earth and Moon must have formed much later – perhaps up to 150 million years after the formation of the solar system. The research results have been published in the scientific journal, Earth and Planetary Science Letters.