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Saturday, October 18, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

Cells' powerhouses were once energy parasites: Study upends current theories of how mitochondria began

Posted: 16 Oct 2014 01:59 PM PDT

Parasitic bacteria were the first cousins of the mitochondria that power cells in animals and plants -- and first acted as energy parasites in those cells before becoming beneficial, according to a new study.

Sugared soda consumption, cell aging associated in new study

Posted: 16 Oct 2014 01:59 PM PDT

Sugar-sweetened soda consumption might promote disease independently from its role in obesity, according to UC San Francisco researchers who found in a new study that drinking sugary drinks was associated with cell aging.

Scientists find 'hidden brain signatures' of consciousness in vegetative state patients

Posted: 16 Oct 2014 11:37 AM PDT

Scientists in Cambridge have found hidden signatures in the brains of people in a vegetative state, which point to networks that could support consciousness even when a patient appears to be unconscious and unresponsive. The study could help doctors identify patients who are aware despite being unable to communicate.

Hubble finds extremely distant galaxy through cosmic magnifying glass

Posted: 16 Oct 2014 11:08 AM PDT

Using the Hubble Space Telescope and the lensing power of giant galaxy cluster Abell 2744, astronomers may have made the most reliable distance measurement yet of an object that existed in the very early universe. The galaxy, estimated to be over 13 billion light-years away, is one of the farthest, faintest, and smallest galaxies ever seen.

Milky Way ransacks nearby dwarf galaxies

Posted: 15 Oct 2014 12:25 PM PDT

Astronomers have discovered that our nearest galactic neighbors, the dwarf spheroidal galaxies, are devoid of star-forming gas, and that our Milky Way Galaxy is to blame.

These roos were 'made' for walking, study suggests of extinct enigmas

Posted: 15 Oct 2014 11:31 AM PDT

Based on a rigorous comparative analysis of kangaroo anatomy, researchers posit that the ancient family of sthenurine kangaroos that lived until 30,000 years ago likely preferred walking to hopping.

Researchers develop world's thinnest electric generator

Posted: 15 Oct 2014 11:28 AM PDT

Researchers have made the first experimental observation of piezoelectricity and the piezotronic effect in an atomically thin material, molybdenum disulfide, resulting in a unique electric generator and mechanosensation devices that are optically transparent, extremely light, and very bendable and stretchable.

Prehistoric crocodiles' evolution mirrored in living species

Posted: 15 Oct 2014 07:17 AM PDT

Crocodiles which roamed the world's seas millions of years ago developed in similar ways to their modern-day relatives, a study has shown. Fresh research into a group of prehistoric marine crocs known as Machimosaurus reveals key details of how and where they lived.

Ancient fossils of bizarre figure-eight water creatures confirmed among our strangest distant cousins

Posted: 15 Oct 2014 07:13 AM PDT

More than 100 years since they were first discovered, some of the world's most bizarre fossils have been identified as close relatives of vertebrates. The fossils belong to 500-million-year-old blind water creatures, known as "vetulicolians". Alien-like in appearance, these marine creatures were "filter-feeders" shaped like a figure eight. In a new paper, researchers argue for a change in the way these creatures are viewed, placing them with the same group that includes vertebrate animals, such as humans.

Some sections of the San Andreas Fault system in San Francisco Bay Area are locked, overdue

Posted: 13 Oct 2014 04:06 PM PDT

Four urban sections of the San Andreas Fault system in Northern California have stored enough energy to produce major earthquakes, according to a new study that measures fault creep. Three fault sections -- Hayward, Rodgers Creek and Green Valley -- are nearing or past their average recurrence interval, according to the new study.

Icebergs once drifted to Florida, new climate model suggests

Posted: 12 Oct 2014 10:48 AM PDT

Using a first-of-its-kind, high-resolution numerical model to describe ocean circulation during the last ice age about 21,000 year ago, oceanographers have shown that icebergs and meltwater from the North American ice sheet would have regularly reached South Carolina and even southern Florida. The models are supported by the discovery of iceberg scour marks on the sea floor along the entire continental shelf.

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