NPR Topics: Health & Science

Don't Count on a Doctor on Board
As many as three out of four flights have a doctor, nurse or paramedic on the passenger list. But one doctor advises passengers with chronic medical conditions to make sure they're taking all necessary precautions.


Bill and Melinda Gates Name New Foundation Head
Jeff Raikes, a 27-year veteran of Microsoft, will take over the $37 billion Gates Foundation in September. Bill and Melinda Gates tell NPR that they picked Raikes because he shares their passion to try to help minimize poverty around the globe.


Mammoth Tomatoes Arose from Genetic Mutation
Those softball-size tomatoes at the supermarket get their heft from a simple genetic mutation that creates extra compartments.


Denver Drivers Learn How to Boost Fuel Economy
Around 400 Denver residents, including the city's mayor, are part of an experiment to see if drivers can be trained to drive "greener." A device in their cars will track whether they have bad driving habits that increase fuel consumption, thus contributing more to greenhouse gas emissions.


Warming Waters Threaten 'Unicorns of the Sea'
Researchers studying the impact of climate change on arctic creatures say that the Narwhal — the long-tusked whale that gave rise to the myth of the unicorn — could be in danger. Narwhals hunt in ice-covered areas and may be among the first animals to feel the heat of warming arctic waters.


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