Scientists Narrow the Time Limits for the Human and Chimpanzee Split
Our closest animal relative is not so far away. Chimpanzees diverged from humans only 5-7 million years ago according to a newly released study of gene sequences. Credit: Anne Fischer, Max Plank-Institute for Evolutionary Anthropology
Scientists Sequence DNA of Woolly Mammoth
Large numbers of tusks in the permafrost museum in Khatanga demonstrate the abundance mammoth once had in the Northern hemisphere. Credit: Debi Poinar, McMaster University
Cosmic Explosion Could Be Black Hole Swallowing Neutron Star
Scientists, including astronomers and astrophysicists at Penn State, have found evidence of a black hole swallowing a neutron star in the afterglow of a split-second flash of intense energy known as a short gamma-ray burst. The events leading up to the gamma-ray burst are shown here. In the minutes and hours that followed, the black hole gobbled up the remaining remnants of the neutron star, producing a series of X-ray flares. Credit: NASA
A First: Hydrogen Atoms Manipulated Below the Surface of a Palladium Crystal
The writing is less than half an Angstrom (0.00005 microns) "tall" off the surface. The characters are less than 500 Angstrom (0.05 microns) high. They were created when Weiss and his team moved hydrogen atoms underneath a palladium surface using a custom-built, ultrastable, low-temperature, scanning tunneling microscope.
Scientists Find Possible Birth of Tiniest Known Solar System
This artist's conception compares a hypothetical solar system centered around a tiny "sun" (top) to a known solar system centered around a star, called 55 Cancri, which is about the same size as our Sun. Credit: NASA/JPL-Caltech
Genealogy of Scaly Reptiles Rewritten by New Research
© Eladio Fernandez 2005 Looks can be deceiving: New gene study redraws family tree of lizards and puts primitive-looking iguanas (shown here) and relatives at the top instead of bottom of the tree.
Scientists Discover How to Flip a Molecular Switch
Credit: Lewis et al. Sequential STM images of FAPPB/R1ATC9 obtained at alternating sample biases of +1.0 and -1.0 V. The majority of the FAPPB molecules (apparent protrusions, displayed as bright spots) switch conductance states between OFF at +1.0 V and ON at -1.0 V sample bias. The red and green boxes follow one FAPPB molecule that exhibits this bias dependence. Imaging conditions: 4000 Å × 4000 Å, I = 2 pA.
Swift Satellite Hailed as "Best of What's New" in Popular Science
Swift Satellite Hailed as "Best of What's New" in Popular Science
New Sculpture Looks Beyond Three Dimensions
The sculpture measures about six feet in every direction and is mounted on a granite base about three feet high.
Short Flash from Enormous Explosion Solves Cosmic Mystery
Credit: Derek Fox/Penn State University Hubble Space Telescope image of the sky surrounding the afterglow and host galaxy of the HETE short burst of July 9, 2005. The circle indicates the region of sky that HETE saw the burst from; according to the HETE team we would find the burst within this region. The box, inset, indicates where the X-ray and optical afterglow of the burst was ultimately found. The colors indicate the intensity of red light (814 nm) as seen by the Advanced Camera for Surveys instrument
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