Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. What is below Earth, since space is present in ...

NASA has thrown a lifeline to scientists working on a mission to visit an asteroid that will make an unusually close flyby of the Earth in 2029, reversing the Trump administration’s previous plan to ...

The filament of matter stretches 50 million light-years, and contains a row of galaxies 5.5 million light-years long that are rotating in sync with the filament. When you purchase through links on our ...

Stand on solid ground and it feels obvious that “down” points toward the center of the planet and “up” leads to the sky. Yet if space stretches in every direction, the idea of something being “beneath ...