A Key Challenge to Harvesting Fusion Energy on Earth

Today in 2002, a strange object designated J002E3 was discovered. It was in a temporary orbit around the Earth. It turned out to be an Apollo 12 rocket stage launched in 1969 that had returned

How much energy do we need to achieve a decent life for all?

Dense 'hot spots' on a young star reveal what Earth's sun may have looked in its infancy