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Science  15 Oct 1999:
Vol. 286, Issue 5439, pp. 371
DOI: 10.1126/science.286.5439.371c

Billions and billions served. If you've ever wondered how the world's health and environment are bearing up under the weight of 6 billion people—a milestone expected to be passed this week—check out this site. It features links to United Nations reports, news articles, and other Web resources, such as a snazzy interactive site in France called Popexpo.

Red light. The hunt for planets outside our solar system is no longer the sole province of the pros. Amateur astronomers who've mounted CCD (charge-coupled device) cameras on their telescopes have begun to collect radial velocity measurements (redshifts), in the hope of finding extrasolar planets. Follow the progress of a team led by a paintball gun manufacturer, or find links to others.

Brain food. It's called Neuroscience for Kids, but this sprawling site has fun and useful stuff for any age. You'll find loads of factoids (like brain weights of different species), a Q&A file (what's the most sensitive body part? the face), and links to online articles on topics from musical aptitude to narcolepsy.


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