Science  01 Jan 1999:
Vol. 283, Issue 5398, pp. 7
DOI: 10.1126/science.283.5398.7b

Over the volcano. Wondering whether Mexico's Popocatepetl volcano is about to blow? Get a quick fix on activity at 11 volcanoes in the Americas at this site, which posts infrared images from two GOES satellites every 15 minutes.

Ethical choice. Those studying the ethical quandaries enveloping cloning and stem cell research, for instance, may want to peruse BIOETHICSLINE, a database of 60,000 references that became available for free this fall.

Fact or fiction? Curious about why the moon looks bigger on the horizon, where “six degrees of separation” comes from, or whether engineers really use chicken cannons to test aircraft engines? Then try this site that debunks modern-day myths.

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