Dubbing these “closed timelike geodesics” (CTGs), Ralph and Sajeendran explain in the paper: “Such a CTG would be ideal for ...

Traveling to space is brutal on the body. Spaceflight can cause astronauts’ bones to lose density, their brain and eye nerves to swell, and their genes to change expression. Research suggests spending ...

Space travel accelerates the aging of human stem cells, reveals new research. Spaceflight speeds up the aging of cells which are "vital" to blood and immune system health, say American scientists. The ...

For years, doctors and scientists have tracked how space changes the human body. Astronauts often come back with weaker muscles, thinner bones, and immune systems that do not respond as well as before ...

How can fission-powered propulsion help advance deep space exploration, specifically to the outer planets like Jupiter, Saturn, Uranus, and Neptune? This is what a recent study presented at the 56th ...

On August 21, 2025, a small but powerful space plane will once again head into orbit, carrying with it experiments that could redefine how humans travel through space. The X-37B, a reusable orbital ...

While astronauts do not leave home to go to war or face combat, families of space travelers may share a few commonalities ...

Russia and China are working hard for a nuclear-powered advantage in space. The U.S. must up its game. Elsayed Talaat is president and chief executive officer of the Universities Space Research ...