Reference

"A weekly, scientific reference mailing service. Screens databases covering life and medical sciences for the key words or the combination of key words specified and will automatically update with any abstract that has come up during the last seven days. Free service."

"Expanding reference resource for science, math and astronomy"

"Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations."

Astronomical/space constants and equations.

"Gives general defintions, background and examples from the science fields of biology, physics, chemistry, math, and history. Includes forum boards."

Reference resource for the biological sciences. Subscription required.

"Online research library for engineers, scientists, and students. Knovel provides full-text reference ebooks from sci-tech publishers embedded with analytical tools."

"Describes how natural phenomena and technological processes work. Covers topics in engineering, aerospace, biology, earth science, astronomy, and physics."

"Ever wonder what the biggest, baddest, and the best are in the natural world? Check out these world records and meet some of the scientists who are studying this stuff."

Cambrosia - webcam network and webcam software. The most comprehensive and easily navigated reference directory for locating live webcams on the internet.