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Observations

Observations

Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Aquatic invasion: Scientists find first amphibious insect species

Several new species of rare Hawaiian moth caterpillars have been discovered to be able to thrive both totally submerged and totally dry. They are the first insects to be described as fully amphibious, reported a team of researchers in a study published online March 22 in the Proceedings of the National Academy of Sciences ...

March 22, 2010 — Katherine Harmon

Attempt to allow sale of elephant ivory fails

The illegal trade in elephant ivory is booming. African elephants are being slaughtered at rates exceeding the former peak in the late 1980s, before Convention on International Trade in Endangered Species, or CITES (pronounced SITE-ees), banned all trade in elephant products...

March 22, 2010 — Michael Moyer

Is Earth past the tipping point?

Biodiversity loss. Land use. Freshwater use. Nitrogen and phosphorus cycles. Stratospheric ozone. Ocean acidification. Climate change. Chemical Pollution.

March 19, 2010 — Mark Fischetti

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