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Mayan Forestry
The early Maya culture practiced forest conservation – and may have paid a heavy price when …
Regrowing Coral
Researchers and volunteers are regrowing imperiled coral reefs by hand.
Rising Health Costs
Rising health care costs have slowed the growth of companies that subsidize employees' insurance.
Placebo Effect Genes
The placebo effect only works for certain people – could this be genetic?
Plant Roundup
Plant geneticists are developing crops that can thrive in salty soils.
Guinea Pigs
A listener asks why guinea pigs aren't often used as laboratory animals anymore.
Vitamin D Deficiency
Vitamin D deficiency in children has become extremely widespread.
Nano-Diamond Therapy
Nano-sized diamonds can help deliver targeted doses of insulin to heal burns.
Dog Intelligence
Dogs have similar cognitive abilities to two-year-old children.