The physics of baseball involves understanding various phenomena such as the break of a curve ball, the flight of a home run, and the impact between bat and ball. The collision is highly inelastic, resulting in lost kinetic energy due to frictional heat and reaction forces that affect the bat's recoil.
Researchers analyzed 176 species of modern-day plants to determine the sources of carbon in the atmosphere hundreds of millions of years ago. However, their results suggest that fossil plants may not provide a direct link between ancient carbon levels and climate change.
A NASA-funded study on climate change and amphibian declines found no significant correlation between the two. However, researchers suggest that disease may be indirectly influenced by climate and environmental factors.
A leading expert warns that amphibian declines are a complex problem with multiple causes, including rising levels of UV-B radiation, pathogens, and pollutants. The lack of a single cause does not diminish the seriousness of this ecological phenomenon.
The study confirms the complex origins of Native Americans by analyzing craniofacial measurements of old and new skulls from around the world. The results separate the native inhabitants of the Western Hemisphere into several different groups, including those descended from Asian groups such as the Jomon people of Japan.
Penn State graduate student Ray Wakeland will demonstrate the fire organ, a heat-driven instrument producing musical sounds, and the daxophone, a unique sound-producing instrument. He will also showcase the Long String Instrument, a large bronze harp-type string instrument that produces ethereal music.
A large case-control study of nearly 1,000 Connecticut women found no significant association between PCBs or DDE exposure and breast cancer risk. The research suggests that previous studies on the topic have been inconclusive due to small sample sizes and lack of consideration for modifying factors.
A study by University of Chicago researchers found that doctors predict their terminally ill patients will live 5.3 times longer than they actually do, leading to unsatisfactory end-of-life care. The study suggests that some improvements may be made by having disinterested doctors provide predictive second opinions.
A newly discovered quasar has surpassed the previous record holder as the earliest known structure in the universe, with a red shift of 5.50 and light journeying 13 billion years to reach Earth. The quasar's discovery sheds light on cosmic evolution and matter distribution at earlier stages of history.
Researchers explore methods to prevent nicotine dependence and mitigate its effects, particularly among adolescents. Studies suggest a vaccine may help prevent tobacco addiction, while depression and delinquency are linked to the progression of tobacco dependence in young people.
A Penn State researcher found that elementary school teachers face enormous time pressure, with those having children feeling the most stressed. Schools need to incorporate the value of teacher's work and family commitments into policy-making.
Leishmaniasis, a deadly tropical disease, has been cured with nearly 100% effectiveness using the oral treatment Miltefosine. The new therapy was discovered in India and shows promise for treating visceral leishmaniasis, a particularly fatal form of the disease.
Researchers at Johns Hopkins Medicine verified Down syndrome in a genetically modified mouse model, finding identical skull and facial deformities as seen in humans. The study used sophisticated statistical techniques to match the mice' data with well-established characteristics of DS patients.
A new Cornell University study reveals that childless couples working for the same employer face unique challenges, including job dissatisfaction, depression, and blurring of work-life roles. Coworking women without children are particularly vulnerable, while coworking men under 50 experience stress due to their job demands.
The BioOne Board will guide policies and progress, comprising ten individuals from collaborating organizations. The aggregation will offer cross-journal searches and inter-journal linking, with a broad selection of journals from AIBS member societies.
Researchers at Arizona State University have identified a viral infection as the likely cause of mass salamander deaths in various regions. The iridovirus, typically found in insects, was detected in infected salamanders across North America and Australia.
Studies suggest that eating chocolate can contribute to a healthy diet, thanks to its antioxidant properties and potential to reduce inflammation. Researchers found that chocolate consumption resulted in increased blood antioxidant capacity and decreased platelet activation within two hours after consumption.
Recent research by Dr. Endel Tulving suggests that episodic memory is essential for human cultural advancement, enabling awareness of the future. Functional neuroimaging studies have identified regions in the frontal lobes linked to past and future awareness.
A new transgenic mouse model has been developed to simulate Parkinson's disease and related disorders, including Alzheimer's disease. The model shows impaired motor function and protein deposits in specific brain regions associated with the diseases, offering a new tool for studying and treating these conditions.
Global warming accelerates human disease outbreaks, malnutrition, and environmental degradation due to increased pollution and crop losses. As populations grow, crowded cities will become breeding grounds for diseases like dengue fever, while waterborne illnesses spread unchecked.