The company raised $425 million in January 2025, around the same time that it turned on Polaris, a prototype reactor. Helion ...

Today: At 7:40 p.m. last night, the Sun reached its highest declination (the official name for sky latitude) of 23.5 degrees ...

Part of NASA's Mars Science Laboratory mission, Curiosity, was the largest and most capable rover ever sent to Mars when it launched in 2011. Curiosity set out to answer the question: Did Mars ever ...