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Science  07 Jul 2000:
Vol. 289, Issue 5476, pp. 7
DOI: 10.1126/science.289.5476.7d

Our family tree. Take a quick jaunt through 5 million years of human history at this small but growing new Smithsonian site on human origins. Check out fossil casts of species such as Australopithecus afarensis and Homo habilis from the museum's collection, reviews of hot research, and an ask-a-scientist page.

Seeing red. Infrared light is emitted even by cool astronomical objects, and it passes through dust without being scattered. That makes it useful for spotting everything from brown dwarfs to galaxies beyond the Milky Way. This educational site covers everything from Sir William Herschel's discovery of infrared from the sun in 1800 using a prism and thermometers, to the latest images from Earth-orbiting observatories.

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