As Elon Musk's SpaceX works toward its first Starship launch of 2026, here's a look back at all the previous test flights between 2023 and 2025.

Nuclear war is much more unpredictable than asteroids, but, unlike the dinosaurs of 66 million years ago, humans can avoid causing their own extinction.

"The origins and acceleration mechanisms of ultrahigh-energy cosmic rays have been among the biggest mysteries in the field ...

Scientists revisiting mysterious 540-million-year-old microfossils from Brazil have overturned a major idea about early ...

Scientists say a massive 2022 volcano eruption may have helped break down methane, offering new clues in the fight against ...

President Donald Trump's trip to China may not come with the same fanfare that accompanied his first-term visit.