- Mar 17, 2004Without oxygen, animal life on Earth would not be possible. But Earth's atmosphere wasn't always rich in oxygen. In fact, to early life, oxygen was a deadly poison. So where did the oxygen come from? And how did life survive the crisis that its arrival
- Feb 28, 2004In Oracle, Arizona, the Biosphere 2 project became the world's largest closed ecosystem. Project managers have now opened its interior to visitors. Among the diverse land, water and air environments enclosed under glass, most of the planet's major biomes are represented to view.
- Apr 27, 2003The 1997 hurricane Nora swept over Western United States delivered surprising evidence of sea salt and microscopic marine life as far inland as Oklahoma. Research aircraft have discovered plankton in high cirrus clouds, which while helping understand space observations, also suggests microbial transport paths.
- Feb 5, 2003If Earth's place and position have no better observer than an astronomer, then its future has no better forecasters than a paleontologist and astronomer familiar with how we got here. Paleontologist Peter Ward and astronomer Donald Brownlee's new book shows how astrobiology will change
- Dec 29, 2002Interview (Part III) with Andrew Knoll, Harvard paleobiologist, about the role of human intervention in shaping the global biosphere: "We just need to recognize that we live in a world where local actions sometimes have large reactions.
- Dec 21, 2002Harvard's Andrew Knoll, esteemed paleontologist, and Berkeley's Norman Myers, renowned conservation biologist, published a colloquium paper in Proceedings of the National Academy of Sciences last year entitled, "The Biotic Crisis and the Future of Evolution."