Warm-blooded fishes swim faster and farther than cold-blooded counterparts

Marine scientists have long known that some species of fish possess a unique physiological characteristic -- a web of arteries and veins lying very close together -- that enables them to raise their internal temperatures higher than that of the water surrounding them.

Now, a new study has demonstrated that species possessing the ability to warm their core -- a process called endothermy -- are able to swim two and a half times faster than those whose body temperature doesn't change. In addition, these species, which include some sharks and tunas, can also swim twice as far -- ranges comparable to those of warm-blooded animals such as penguins and other marine mammals.

Fresh evidence for how water reached Earth found in asteroid debris

Water delivery via asteroids or comets is likely taking place in many other planetary systems, just as it happened on Earth, new research strongly suggests.

Published by the University of Warwick, the research finds evidence for numerous planetary bodies, including asteroids and comets, containing large amounts of water.

The research findings add further support to the possibility water can be delivered to Earth-like planets via such bodies to create a suitable environment for the formation of life.

Researchers closer to being able to change blood types

What do you do when a patient needs a blood transfusion but you don't have their blood type in the blood bank? It's a problem that scientists have been trying to solve for years but haven't been able to find an economic solution -- until now.

Extra sleep fixes memory problems in flies with Alzheimer's-like condition

Many studies have linked more sleep to better memory, but new research in fruit flies demonstrates that extra sleep helps the brain overcome catastrophic neurological defects that otherwise would block memory formation, report scientists at Washington University School of Medicine in St. Louis.

Studying three groups of flies, the scientists interfered with their ability to remember by disabling a different critical memory gene in each group.

Giant sea lizards in the age of dinosaurs: A new beginning for baby mosasaurs

They weren't in the delivery room, but researchers at Yale University and the University of Toronto have discovered a new birth story for a gigantic marine lizard that once roamed the oceans.

Paleontologists now believe that mighty mosasaurs -- which could grow to 50 feet long -- gave birth to their young in the open ocean, not on or near shore.

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