For the past 5 billion years, the expansion of the universe has been powered by a mysterious repulsive force known as dark energy.
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The Sloan Digital Sky Survey III (SDSS-III), an international collaboration that includes Penn State astronomers, has produced the largest-ever three-dimensional map of massive galaxies and distant black holes.
Why do adults continue to play throughout their lives while most other mature mammals cease such behavior?
An analysis of newly sequenced polar bear genomes is providing important clues about the species' evolution, suggesting that climate change and genetic exchange with brown bears helped create the polar bear as we know it today.
A loose group of stars that has been known for more than 180 years but never before studied in detail has been revealed to be an important new tool in the quest to understand the evolution of stars like the Sun, and in the search for planets like Earth.
A new space telescope is scheduled to rocket into orbit during a launch window that begins at 11:30 a.m. EDT on June 13.
In a single new scientific publication, 24 new species of lizards known as skinks, all from islands in the Caribbean, have been discovered and scientifically named.
Penn State astronomers using the world's largest radio telescope, at Arecibo, Puerto Rico, have discovered flaring radio emissions from an ultra-cool star, not much warmer than the planet Jupiter, shattering the previous record for the lowest stellar temperature at which radio waves were detected.
The ability for computer technology to automatically create a society of smart, tolerant citizens may be more hype and hope than reality...