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Mystery of how first animals appeared on Earth solved

Science Daily - 7 hours 45 min ago
Research has solved the mystery of how the first animals appeared on Earth, a pivotal moment for the planet without which humans would not exist.

World's largest volcanic range may lurk beneath Antarctic ice

Science Daily - Mon, 08/14/2017 - 08:27
West Antarctica's vast ice sheet conceals what may be the largest volcanic region on Earth, new research has revealed.

Lunar dynamo's lifetime extended by at least 1 billion years

Science Daily - Wed, 08/09/2017 - 13:20
Astronomers report that a lunar rock collected by NASA's Apollo 15 mission exhibits signs that it formed 1 to 2.5 billion years ago in the presence of a relatively weak magnetic field of about 5 microtesla. That's around 10 times weaker than Earth's current magnetic field but still 1,000 times larger than fields in interplanetary space today.

Antarctic bacterium has one of the biggest proteins ever found

Science Daily - Wed, 08/09/2017 - 13:20
A bacterium living in the icy-cold waters of Antarctica manages to survive by gripping on to the ice surface. The protein used by the bacterium to do this -- a kind of extendable anchor -- has been detailed by a group of researchers. Quite special, because at 600 nanometers, it is one of the biggest proteins for which the structure has ever been identified.

Post-glacial history of Lake of the Woods

Science Daily - Wed, 08/09/2017 - 06:36
The extent and depth of lakes in glaciated regions of North America are controlled by climate and the influence of differential isostatic rebound of the land's surface that began when Pleistocene ice melted from the continent. This relationship and the post-glacial history of Lake of the Woods -- one of the largest lake complexes in North America and the source of water for the city of Winnipeg -- is presented for the first time in a new study by five Canadian researchers.

2016 was another warm year, report confirms

Science Daily - Wed, 08/09/2017 - 06:33
A new report confirms that 2016 was another exceptionally warm year, with global temperature having reached 0.77± 0.09 degrees C above its level between 1961 and 1990.

Not all glaciers in Antarctica have been affected by climate change

Science Daily - Tue, 08/08/2017 - 17:23
The effects of climate change, which are apparent in other parts of the Antarctic continent, are not yet observed for glaciers in the western Ross Sea coast, new research indicates.

No longer water under the bridge, statistics yields new data on sea levels

Science Daily - Tue, 08/08/2017 - 13:59
While the scientific community has long warned about rising sea levels and their destructive impact on some of the United States' most populous cities, researchers have developed a new, statistical method that more precisely calculates the rate of sea level rise, showing it's not only increasing, but accelerating.

Laser mapping project shows effects of physical changes in Antarctica's Dry Valleys

Science Daily - Tue, 08/08/2017 - 13:53
Researchers have publicly released high-resolution maps of Antarctica's McMurdo Dry Valleys, a globally unique polar desert.

Researchers crack the 'Karakoram anomaly': Why glaciers near K2 are growing in size

Science Daily - Mon, 08/07/2017 - 10:28
Researchers identify 'Karakoram vortex' and explain why glaciers near K2 are growing in size.

Extreme melt season leads to decade-long ecosystem changes in Antarctic polar desert

Science Daily - Mon, 08/07/2017 - 10:15
An abnormal season of intense glacial melt in 2002 triggered multiple distinct changes in the physical and biological characteristics of Antarctica's McMurdo Dry Valleys over the ensuing decade, report investigators.

Alaska's North Slope snow-free season is lengthening

Science Daily - Thu, 08/03/2017 - 13:10
On the North Slope of Alaska, snow is melting earlier in the spring and the snow-in date is happening later in the fall, according to a new study.

Climate change could put rare bat species at greater risk

Science Daily - Wed, 08/02/2017 - 08:27
An endangered bat species with a UK population of less than 1,000 could be further threatened by the effects of global warming, according to a new study.

Update on the Larsen-C iceberg breakaway

Science Daily - Wed, 08/02/2017 - 07:29
Since an iceberg four times the size of London broke free earlier this month, scientists have continued to track its progress using satellites. Their observations show the Larsen-C story might not be over yet.

Glaciers may have helped warm Earth

Science Daily - Mon, 07/31/2017 - 15:44
Weathering of Earth by glaciers may have warmed the planet over eons by aiding the release of carbon dioxide into the atmosphere. A new study shows the cumulative effect may have created negative feedback that prevented runaway glaciation.

Methane-eating microbes may reduce release of gases as Antarctic ice sheets melt

Science Daily - Mon, 07/31/2017 - 12:41
A lake beneath the West Antarctic ice sheet contains large amounts of methane and describes how methane-eating microbes may keep the climate-warming gas from entering the atmosphere.

Loss of Arctic sea ice impacting Atlantic Ocean water circulation system

Science Daily - Mon, 07/31/2017 - 10:46
Arctic sea ice is not merely a passive responder to the climate changes occurring around the world, according to new research. Scientists say the ongoing Arctic ice loss can play an active role in altering one of the planet's largest water circulation systems: the Atlantic Meridional Overturning Circulation (AMOC).

Summer sea ice melt in the Arctic

Science Daily - Mon, 07/24/2017 - 12:31
Earlier this year Arctic sea ice sank to a record low wintertime extent for the third straight year. Now NASA is flying a set of instruments north of Greenland to observe the impact of the melt season on the Arctic's oldest and thickest sea ice.

Mountain glaciers recharge vital aquifers

Science Daily - Fri, 07/21/2017 - 08:54
Small mountain glaciers play a big role in recharging vital aquifers and in keeping rivers flowing during the winter, according to a new study. The study also suggests that the accelerated melting of mountain glaciers in recent decades may explain a phenomenon that has long puzzled scientists -- why Arctic and sub-Arctic rivers have increased their water flow during the winter even without a correlative increase in rain or snowfall.

Ancient Italian fossils reveal risk of parasitic infections due to climate change

Science Daily - Thu, 07/20/2017 - 14:53
In 2014, a team of researchers found that clams from the Holocene Epoch (that began 11,700 years ago) contained clues about how sea level rise due to climate change could foreshadow a rise in parasitic trematodes. Now, an international team has found that rising seas could be detrimental to human health on a much shorter time scale.

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