A massive collision between two exoplanets may have created the iron-rich exoplanet Kepler 107c, one of the innermost planets orbiting the star Kepler 107 about 2,000 light-years from Earth, according to findings published in Nature Astronomy. Computer models suggest that two huge exoplanets with iron cores could have collided to create one body with an iron core like that of Kepler 107c.
The DNA of red wolves, which were thought to be extinct in the wild since 1980, is living on in unusual canids in Texas, a study published in Genes suggests. Tests concluded that the animals are predominantly coyote, but their DNA also contains "ghost alleles" that can be directly correlated with red wolves.
A tomb containing dozens of mummies dating between 323 B.C. and 30 B.C. has been found in central Egypt, according to the country's Ministry of Antiquities. The Ptolemaic-era tomb likely belonged to a family, ministry officials say, and contained over 40 bodies within several chambers.
A database of Alzheimer's disease-linked protein expression changes in the brain has been unveiled, and researchers are making it accessible to other scientists online at no cost, according to a study in Communications Biology. "This database provides a huge opportunity for dementia researchers around the world to progress and to follow-up new areas of biology and develop new treatments," said study co-author Richard Unwin.
Researchers found that only 3% of US high-school girls and 7% of boys get the recommended amount of sleep, exercise and screen time daily, according to findings published in JAMA Pediatrics. The study also showed the populations least likely to meet the guidelines are black and Asian teenagers, along with adolescents with depression symptoms or who are obese.
Japanese researchers found that fasting caused an up to 60-fold increase in 44 metabolites, just 14 of which were linked to fasting previously. Published in the journal Scientific Reports and based on four volunteers who fasted for 58 hours, findings showed that fasting helped increase the number of the metabolites isoleucine, leucine and ophthalmic acid, which are linked to aging and may explain how fasting was shown to extend lifespan in an earlier animal study.
The National Cancer Institute has awarded a $3.2 million grant to Cleveland's Case Comprehensive Cancer Center to study racial disparities in colorectal and breast cancers. Researchers will use the funds to examine differences in biomarkers and other factors at the molecular level and from a population perspective.
NASA has awarded a grant to 3D-printing materials company Copper 3D through the NASA Nebraska Space Grant Consortium. The funds will be used "to examine the development, validation, and mechanically characterization of antimicrobial 3D-printed medical devices for astronauts," said researcher Jorge Zuniga of the University of Nebraska Omaha.
The deadline has been extended to Feb. 15 for professional researchers to submit proposals to lead symposia, oral or poster research presentations, panel discussions, and workshops at the 2019 Sigma Xi Annual Meeting and Student Research Conference. The meeting theme, "Our Changing Global Environment," encourages scientific discussions on environmental changes and their societal, economical, and policy implications. The committee welcomes proposals that address multidisciplinary solutions and strategies for environmental change mitigation and adaptation across life sciences, physical sciences, and engineering.
The new issue of American Scientist features articles on estimating ancient populations by aerial survey, science-based wildlife conservation policy, frequency hopping, pillbox engineering, the rise of baleen filter feeding, keeping birds out of jet engines, and much more! Sigma Xi members should look for their digital or print editions (additional content is exclusively available on the American Scientist website). Nonmembers can find the magazine on newsstands or order a copy for $5.95 plus shipping fees by calling 1-800-282-0444 and selecting option 4.