Of course you want a more powerful stride as you cruise through your miles so you gain better running economy, more speed, and stay injury-free. For that, you might lean on strides and speed workouts ...

Of course you want a more powerful stride as you cruise through your miles so you gain better running economy, more speed, and stay injury-free. For that, you might lean on strides and speed workouts ...

NPR's Ayesha Rascoe speaks to Jesse Jenkins of Princeton University about enhanced geothermal energy, a clean, renewable power source that is being tested on a large scale. Enhanced geothermal energy ...

Correction: This story has been updated to accurately reflect the current cost of next-generation geothermal energy. Advances in oil and gas drilling have cut costs for a form of clean power that ...