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PaleontologyFrozen rainforest
Fossils trapped in amber provide evidence that the Amazonian rainforest dates back 10 to 15 million years.
By Eric Jaffe -
EarthWhen a Shot Is Not: PCBs may impair vaccine-induced immunity
Exposure to certain pollutants early in life may do lasting harm to the immune system by blocking its response to vaccinations.
By Ben Harder -
Moss Express: Insects and mites tote mosses’ sperm
A lab test has shown that mosses have their own version animal-courier system for sperm that's similar to pollination.
By Susan Milius -
TechWheel of Life: Bacteria provide horsepower for tiny motor
Crawling bacteria can power a micromotor.