This is especially the case during long-term spaceflight, in which the astronauts are subjected to a long period of low gravity. As a result, the body forms fewer osteoblasts (bone-building cells), leading to a loss of bone mass and greater susceptibility to fractures.Īs The Conversation reports, astronauts rarely get some decent shuteye when they're off-world. Take away gravity for an extended period of time, and that mechanical strain goes away. That means it's under constant stress, and our muscles and bones develop specifically to withstand that stress. Because all human beings are born on Earth, an environment perpetually under the influence of gravity, the body's development is greatly affected by gravity's constant downward pull. On paper, this sounds fun - but in practice for long periods of time, it's dangerous and even lethal to human health. Nature defines zero gravity as "a state of weightlessness," which is what happens when a spacecraft's acceleration counterbalances (and effectively cancels out) Earth's gravity. Namely, your own body.Īstronauts have had extensive experience when it comes to living in an environment with no gravity. Thus, it's best to focus on the small, easy stuff first.
Truth be told, so many things would simultaneously go wrong if gravity suddenly went kaput.
0 kommentar(er)
