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Scientists believe they have uncovered “new evidence” that shows how acute stress can cause hair to turn white prematurely. Mice experiments have revealed that extreme levels of stress causes the sympathetic nervous system, which is responsible for the body’s rapid involuntary response to dangerous or stressful situations, to become hyperactive. This, in turn, drives the rapid depletion of stem cells responsible for hair colour, leading to pigment loss and development of [...]

Scientists believe they have uncovered “new evidence” that shows how acute stress can cause hair to turn white prematurely. Mice experiments have revealed that extreme levels of stress causes the sympathetic nervous system, which is responsible for the body’s rapid involuntary response to dangerous or stressful situations, to become hyperactive. This, in turn, drives the rapid depletion of stem cells responsible for hair colour, leading to pigment loss and development of [...]

WASHINGTON (AP) — Researchers report two newly discovered species of electric eels in South America, one of which can deliver a bigger jolt than any other known animal. The researchers collected 107 eels in four countries and found differences in their DNA, along with minor physical variations. One species had the ability to generate 860 volts of electricity, more than the 650 volts discharged by the only previously identified type of electric eel. While 250 species of fish in South [...]

Two new electric eel species have been identified in the Amazon basin, including one fish with a record-breaking shock, scientists say. Researchers had previously identified only one species of electric eel in more than 250 years of studying the creatures that lurk in South American waters and stun their prey with electric discharges. However, the new genetic and ecological analysis, published Tuesday in the peer-reviewed Nature Communications, identifies a total of three unique [...]

Something of a boom in the discovery of new species is taking place right now. It is so significant that some say it is similar to the period of the 18th and 19th centuries when European naturalists ventured into newly discovered lands and brought back an astonishing number of exotic new plants and animals. But how can this be so when species worldwide are disappearing at unprecedented rates? This is the dichotomy Earth finds itself in as it enters a new chapter in its history – the [...]

The toothpaste aisle may be full of tubes that claim to help with sensitivity and prevent enamel erosion, but these promises fall flat, according to a new study. Tooth sensitivity and enamel loss may seem like two separate problems, but the issues are related, according to study co-author and researcher Samira Helena João-Souza of the University of São Paulo's School of Dentistry in Brazil. "Research has shown that dentin exposed with open tubules causes hypersensitivity, and erosion is one [...]

An exotic form of single-celled life that lives alone, surviving on nuclear energy and never seeing the light of day, could be just the sort of life that can thrive on Europa, the icy moon orbiting Jupiter that scientists consider one of the best candidates for finding life beyond Earth. That's the conclusion of a recent paper published in the journal Scientific Reports. Discovered in 2009, these critters are incredibly weird. This species creates primitive ecosystems all by [...]

The Amazon rainforest is described as the planet’s lungs for good reason. So much carbon is locked up in its trees that protecting the forest is a must if we want to do something about global warming. However, reducing the CO₂ that is emitted when a tropical forest is destroyed depends not only on stopping the actual deforestation, but also on fighting wildfires within the forest. In a new study published in Nature Communications we show that forest fires are responsible for a huge portion [...]

LAS CAMPANAS OBSERVATORY, Chile — Construction of the world's biggest telescope is now underway. A star-studded groundbreaking ceremony here in the Chilean Andes Wednesday evening (Nov. 11) — attended by Chilean President Michelle Bachelet, United States ambassador to Chile Michael Hammer and other dignitaries — officially ushered the $1 billion Giant Magellan Telescope (GMT) into the construction phase. When it's finished, GMT will boast a light-collecting surface more than twice as [...]