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Pulsar Bursts Coming From Beachball-Sized Structures

In a major breakthrough for understanding what one of them calls “the most exotic environment in the Universe,” a team of astronomers has discovered that powerful radio bursts in pulsars are generated by structures as small as a beach ball.

“These are by far the smallest objects ever detected outside our solar system,” said Tim Hankins, leader of the research team, which studied the pulsar at the center of the Crab Nebula, more than 6,000 light-years from Earth. “The small size of these regi

European astronomers observe first evaporating planet

Using the Hubble Space Telescope, for the first time, astronomers have observed the atmosphere of an extrasolar planet evaporating off into space. Much of this planet may eventually disappear, leaving only a dense core. The planet is a type of extrasolar planet known as a ’hot Jupiter’. These giant, gaseous planets orbit their stars very closely, drawn to them like moths to a flame.

The scorched planet called HD 209458b orbits ‘only’ 7 million kilometres from its yellow Sun-like st

Crash in male saiga antelope numbers drives species closer to extinction

Scientists researching the population numbers of saiga antelope in Russia have found that in the case of the male, there may be a deadly truth in the old boast, ’So many women, so little time.’

Making use of data gathered from a 10-year field study, scientists report in Nature today that saiga antelope, which rank in the World Conservation Union’s category of most endangered species, are being pushed closer to extinction because there are not enough male antelopes to mate with the fe

New tools speed drug discovery and disease research

To study the genetic components of disease, researchers rely on mice or other research models in which particular genes are silenced, or turned off. In recent years, researchers discovered that they can selectively silence genes using small pieces of RNA called siRNA (short interfering RNA).

Unfortunately, sorting out which siRNA sequences block expression of which genes has proven to be truly daunting. Researchers at Whitehead Institute, however, recently released for public use a new comp

USC researchers uncover age discrimination in secretory cells

Study featured on cover of the journal Nature

Hormones and neurotransmitters secreted from cells via bubble-like vesicles are released using age-related criteria, with the youngest vesicles getting first shot at releasing their contents, according to research led by a University of Southern California (USC) physiologist. This is a “complete reverse” from what had previously been presumed to be the process behind hormone secretion, notes Robert Chow, M.D., Ph.D., associate professor of

Virtual observatory prototype produces surprise discovery

Early demo project identifies new brown dwarf

A new approach to finding undiscovered objects buried in immense astronomical databases has produced an early and unexpected payoff: a new instance of a hard-to-find type of star known as a brown dwarf.

Scientists working to create the National Virtual Observatory (NVO), an online portal for astronomical research unifying dozens of large astronomical databases, confirmed discovery of the new brown dwarf recently. The star emerge

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