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| ©NASA |
| This artistic impression shows what the solar system could have looked like once upon a time. However, how homogenous the solar nebula actually was is debatable. |
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| ©NIST |
| (a) In a Rydberg atom, an electron (black dot) is far away from the atomic nucleus (red and grey core). (b) Probability map for an electron in a Rydberg atom shows that it has virtually no probability of being near the nucleus in the center. (c) An optical frequency comb for producing ultraprecise colors of light can trigger quantum energy jumps useful for accurately measuring the Rydberg constant. |
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| ©Nicolle Rager Fuller, National Science Foundation |
| Researchers examined the teeth of Paranthropus boisei, also called the "Nutcracker Man," an ancient hominin that lived between 2.3 and 1.2 million years ago. The "Nutcracker Man" had the biggest, flattest cheek teeth and the thickest enamel of any known human ancestor and was thought to have a regular diet of nuts and seeds or roots and tubers. But analysis of scratches on the teeth and other tooth wear reveal the pattern of eating for the "Nutcracker Man" was more consistent with modern-day fruit-eating animals. |
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| ©University of Cincinnati |
| Wild sunflowers in Nuevo Leon in the foothills of the Sierra Madre Oriental mountains. |
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| ©NASA/JPL/Space Science Institute |
| It is no Great Red Spot, but these two side-by-side views show the longest-lived electrical storm yet observed on Saturn by NASA's Cassini spacecraft. The view at left was created by combining images taken using red, green and blue spectral filters, and shows Saturn in colors that approximate what the human eye would see. The storm stands out with greater clarity in the sharpened, enhanced color view at right. |
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| ©NASA |
| A thermonuclear explosion as it engulfs an entire neutron star. |
