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Being the top U.S. diplomat means a lot of global travel — roughly a million miles and 100 countries these days. Yet Kerry is the first to see Antarctica and all seven continents.

At about 1.6 million years old, the bone is the oldest known example of a malignant tumor in a human ancestor, and it reinforces what scientists already knew: that cancer isn't a modern scourge.

NPR's Don Gonyea speaks with Cara Buck, acting country director for Mercy Corps, about the recent earthquake in Haiti.

The 7-month-old spotted beauty was rescued from wildlife trafficking and will be living alongside a 6-year-old male named Valerio. There are only 15,000 believed to be living in the wild.

A study of trees in dozens of cities found that urban heat and light pollution are pushing urban trees to sprout leaves about a week earlier than trees in more rural settings.

A leaked document from the Environmental Protection Agency suggests that the agency is considering a significant change in air-pollution rules. It would give chemical factories, refineries and manufacturing plants new leeway to increase emissions of pollutants that can cause cancer and birth defects.

The USGS wants to test if butterflies and other insects are being hurt by contaminants, such as those in pesticides. It's seeking specimens from Alabama, Georgia, Kansas, Nebraska, Oklahoma and Texas.

Scientists have long wondered what's in the wispy cloud of gas floating in the space between the stars, absorbing starlight. Turns out it's a form of carbon named after architect Buckminster Fuller.

An entomologist researched the worms used in mescal to better understand the relationship between the creatures and specific agave plants - and the danger if harvesting increases.

Dominique Dawes was the first Black American woman to win an individual Olympic medal in gymnastics.