Scientists in the National Oceanic and Atmospheric Administration are still trying to understand what exactly caused a tsunami to strike the East Coast in June. There was no seismic record of the incident. But a team of scientists came together to analyze tidal and weather data. They believe the tsunami may have been caused by a weather phenomenon known as a "derecho."
Across the Midwestern corn belt, a familiar battle has resumed, hidden in the soil. On one side are tiny, white larvae of the corn rootworm. On the other side are farmers and the insect-killing arsenal of modern agriculture.
In many parts of Africa, elephants are threatened by poaching. But in South Africa, they're doing so well that some game reserves say they're overpopulated. Now, many of those reserves are trying to limit elephant reproduction even while some ecologists believe it's the wrong approach. Willow Belden reports.
They scuttle, peck, scuttle, peck, then they dash up the shoreline, dodging waves, heads down, concentrating. What are they doing? They're "looking for something, something, something," writes the poet Elisabeth Bishop.