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

The ice giants remain some of the most interesting places to explore in the solar system. Uranus in particular has drawn a ...

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 ...

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 ...

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 ...

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