878,761 articles

Enzyme triggers cell death in heart attack

A new study shows that CaM kinase II enzyme activity triggers heart cell death by making the cells' energy-producing mitochondria leaky. Inhibiting the enzyme in mitochondria protected mice from heart cell death during heart attack and other forms of heart stress. The findings could lead to better therapies for common forms of heart...

More than just 'zoning out': Exploring the cognitive processes behind mind wandering

It happens innocently enough: One minute you're working on a report and the next minute you're thinking about how you need to do laundry. Mind wandering is frequent and common. And while it can be counterproductive, research suggests that mind wandering isn't necessarily a bad thing. New research explores mind wandering in various contexts, examining how it relates to cognitive processes involved...

Samsung Intros Galaxy S III Mini with Smaller Screen, Lower Specs

Adding even more size diversity to its array of Android devices, mobile king Samsung Electronics on Thursday unveiled its Galaxy S III mini, a scaled-down version of its flagship phone, targeted at European markets. Instead of 4.8 inches, its Super AMOLED touchscreen is just 4 inches, the same size as Apple's iPhone 5. The iPhone is the most popular single device in the world, while Samsung is...

A Handheld Projector You Might Actually Want

With built-in Roku, it's like a portable internet TV. Here’s something you probably didn’t know you wanted. 3M has come up with a handheld projector--or “picoprojector”--with a Roku Streaming Stick built in. That means that the $300 device can function as something of a portable TV, with access to Netflix, Amazon Instant, Hulu Plus, HBO Go, and the like....

Developmental biologist proposes new theory of early animal evolution, challenges basic assumptions

A New York Medical College developmental biologist whose life's work has supported the theory of evolution has developed a concept that dramatically alters one of its basic assumptions—that survival is based on a change's functional advantage if it is to persist. Stuart A. Newman, Ph.D., professor of cell biology and anatomy, offers an alternative model in proposing that the origination of the...

Earth sunblock only needed if planet warms easily

(Phys.org)—An increasing number of scientists are studying ways to temporarily reduce the amount of sunlight reaching the earth to potentially stave off some of the worst effects of climate change. Because these sunlight reduction methods would only temporarily reduce temperatures, do nothing for the health of the oceans and affect different regions unevenly, researchers do not see it as a...

Fly eye mystery: Research provides insight into why flies have fastest vision in animal kingdom

Fly eyes have the fastest visual responses in the animal kingdom, but how they achieve this has long been an enigma. A new study shows that their rapid vision may be a result of their photoreceptors - specialised cells found in the retina - physically contracting in response to light. The mechanical force then generates electrical responses that are sent to the brain much faster than, for example,...

Focus on space debris: Envisat

(Phys.org)—Space debris came into focus last week at the International Astronautical Congress in Naples, Italy. Envisat, ESA's largest Earth observation satellite, ended its mission last spring and was a subject of major interest in the Space Debris and Legal session.

Half-century-long quest to observe chemical reactions in quantum realm achieved

At very low temperatures, close to absolute zero, chemical reactions may proceed at a much higher rate than classical chemistry says they should – because in this extreme chill, quantum effects enter the picture. A Weizmann Institute team has now confirmed this experimentally; their results would not only provide insight into processes in the intriguing quantum world in which particles act as...

Moroccan desert meteorite delivers Martian secrets

A meteorite that landed in the Moroccan desert 14 months ago is providing more information about Mars, the planet where it originated. University of Alberta researcher Chris Herd helped in the study of the Tissint meteorite, in which traces of Mars' unique atmosphere are trapped.

Scientists focus on quorum sensing to better understand bacteria

The relatively new field in microbiology that focuses on quorum sensing has been making strides in understanding how bacteria communicate and cooperate. Quorum sensing describes the bacterial communication between cells that allows them to recognize and react to the size of their surrounding cell population. While a cell's output of extracellular products, or "public goods," is dependent on the...