Earth

ANN ARBOR, Mich. - A male's total testosterone level may be linked to more than just sexual health and muscle mass preservation, a new study finds. Low amounts of the hormone could also be associated with chronic disease, even among men 40 years of age and younger.

Even as botany has moved firmly into the era of "big data," some of the most valuable botanical information remains inaccessible for computational analysis, locked in physical form in the orderly stacks of herbaria and museums. Herbarium specimens are plant samples collected from the field that are dried and stored with labels describing species, date and location of collection, along with various other information including habitat descriptions.

With summer approaching, "sea and sun" might conjure up images of a beach trip. But for scientists, the interactions of the two have big implications for the climate and for the formation of tiny droplets, or aerosols, that lead to clouds. In ACS Central Science, researchers demonstrate that sunlight can cause certain molecules at the ocean's surface to activate others, resulting in larger molecules that could affect the atmosphere.

For years, bioengineer Yaling Liu has been in pursuit of the deadly tumor cell. Liu has been perfecting a microfluidic device the size of two quarters that has the ability to catch and release circulating tumor cells (CTCs)--cancer cells that circulate in a cancer patient's blood. Such a device could lead to earlier detection of primary tumors and metastasis, as well as determine the effectiveness of treatment--all through a simple, non-invasive blood test.

Animal species with males who compete intensively for mates might be more resilient to the effects of climate change, according to research by Queen Mary University of London.

Moths exposed to increasing temperatures were found to produce more eggs and have better offspring survival when the population had more males competing for mating opportunities (three males for every female).

Biologists at the University of California San Diego have developed a method of manipulating the genes of an agricultural pest that has invaded much of the United States and caused millions of dollars in damage to high-value berry and other fruit crops.

Research led by Anna Buchman in the lab of Omar Akbari, a new UC San Diego insect genetics professor, describes the world's first "gene drive" system--a mechanism for manipulating genetic inheritance--in Drosophila suzukii, a fruit fly commonly known as the spotted-wing drosophila.

Without microorganisms humans would not be able to survive. Especially our gut flora is an extremely densely populated ecosystem that houses billions of bacteria which help us to digest or detoxify food, supply us with vitamins, or modulate our immune system. Similarly, plants have also a so-called microbiome. In contrast to animals and humans, microorganisms associated with plants are primarily soil microbiota. Scientists consider the soil microbiome as a kind or external plant immune system.

DURHAM, N.C. -- Climate change could speed the natural regrowth of forests on undeveloped or abandoned land in the eastern U.S., according to a new study.

If left to nature's own devices, a field of weeds and grasses over time will be replaced by saplings, young trees and eventually mature forest. Earlier research has shown that this succession from field to forest can happen decades sooner in the southeastern U.S. than in the Northeast. But it wasn't obvious why, especially since northern and southern fields are first colonized by many of the same tree species.

Many clinicians advise patients with atrial or ventricular arrhythmias to avoid caffeinated beverages, but recent research has shown that coffee and tea are safe and can reduce the frequency of arrhythmias, according to a review published today in JACC: Clinical Electrophysiology.

SOLOMON ISLANDS (April 16, 2018) - Globally, remaining tropical forests are being rapidly cleared, particularly in countries like the Solomon Islands where commercial logging accounts for about 18 percent of government revenue, and at least 60 percent of exports while providing the largest number of formal sector jobs. However, the loss of native forests has huge ecological and social consequences, many of which are poorly documented.