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New research from the Antarctic Peninsula shows that the summer melt season has been getting longer over the last 60 years. Increased summer melting has been linked to the rapid break-up of ice shelves in the area and rising sea level.
The Antarctic Peninsula -- a mountainous region extending northwards towards South America -- is warming much faster than the rest of Antarctica. Temperatures have risen by up to 3 oC since the 1950s -- three times more than the global average. This is a result of a strengthening of local westerly winds, causing warmer air from the sea to be pushed up and over the peninsula. In contrast to much of the rest of Antarctica, summer temperatures are high enough for snow to melt.
- Category: Science & Technology
Zooplankton, small fish and squid spend hardly any time at the surface when there's a full moon. To protect themselves from their natural enemies, they hide deeper down in the water on bright nights, coming up to the surface under cover of darkness when there's a new moon instead. Scientists at the Max Planck Institute for Ornithology in Radolfzell discovered that this also influences the behaviour of swallow-tailed gulls (Creagrus furcatus), a unique nocturnal species of gull from the Galapagos Islands.
- Category: Science & Technology
Scientists have identified a key molecule responsible for triggering the chemical processes in our brain linked to our formation of memories. The findings, published in the journal Frontiers in Neural Circuits, reveal a new target for therapeutic interventions to reverse the devastating effects of memory loss.
The BBSRC-funded research, led by scientists at the University of Bristol, aimed to better understand the mechanisms that enable us to form memories by studying the molecular changes in the hippocampus -- the part of the brain involved in learning.
- Category: Science & Technology
University of Liège researchers have demonstrated that the physiological mechanisms triggered during NDE lead to a more vivid perception not only of imagined events in the history of an individual but also of real events which have taken place in their lives! These surprising results - obtained using an original method which now requires further investigation - are published in PLOS ONE.
- Category: Science & Technology
Four words on a previously unknown papyrus fragment provide the first evidence that some early Christians believed Jesus had been married, Harvard Professor Karen King told the 10th International Congress of Coptic Studies today.
King, the Hollis Professor of Divinity at Harvard Divinity School, announced the existence of the ancient text at the Congress's meeting, held every four years and hosted this year by the Vatican's Institutum Patristicum Augustinianum in Rome. The four words that appear on the fragment translate to, "Jesus said to them, my wife." The words, written in Coptic, a language of ancient Egyptian Christians, are on a papyrus fragment of about one and a half inches by three inches.
- Category: Science & Technology
Diving and plunging through the waves to feed, some whales throw their jaws wide and engulf colossal mouthfuls of fish-laden water while other species simply coast along with their mouths agape (ram or skim feeding), yet both feeding styles rely on a remarkable substance in the whales' mouths to filter nutrition from the ocean: baleen. Alexander Werth from Hampden-Sydney College, USA, explains that no one knew how the hairy substance actually traps morsels of food.
- Category: Science & Technology
For deer mice living in the Nebraska Sandhills, color can be the difference between life and death.
When the dark-coated mice first colonized the region, they stood out starkly against the light-colored, sandy soil, making them easy prey for predators. Over the next 8,000 years, however, the mice evolved a system of camouflage, with lighter coats, changes in the stripe on their tails, and changes in body pigment that allowed them to blend into their habitat.
- Category: Science & Technology
Models of carbon dioxide in the world's oceans need to be revised, according to new work by UC Irvine and other scientists published online Sunday in Nature Geoscience. Trillions of plankton near the surface of warm waters are far more carbon-rich than has long been thought, they found. Global marine temperature fluctuations could mean that tiny Prochlorococcus and other microbes digest double the carbon previously calculated. Carbon dioxide is the leading driver of disruptive climate change.
- Category: Science & Technology
Setting up home in the stinging tentacles of a sea anemone might seem like a risky option, but anemonefish -- also known as clownfish and popularised in the movie Finding Nemo -- are perfectly content in their unlikely abode. Fending off peckish anemone predators in return for refuge, plucky clownfish have achieved a satisfactory arrangement with their deadly partners. Yet Joe Szczebak from Auburn University, USA, wondered whether there might be more to the unconventional collaboration than met the eye.
- Category: Science & Technology
A field study of aerosol impacts on clouds and precipitation in the Sierra Nevada shows that dust and microorganisms transported from as far away as the Sahara desert help to spur the precipitation that California counts on for its water supply.
The CalWater field campaign, funded by the California Energy Commission and led by UC San Diego and NOAA, could help western states better understand the future of their water supply and hydropower generation as climate change influences how much and how often dust travels around the world and alters precipitation far from its point of origin.
- Category: Science & Technology
