00:00Astronauts who return from six months in space cannot walk.
00:02Their bones have lost density.
00:03Their muscles have shrunk.
00:04Their eyes have physically changed shape.
00:06Space does not just challenge the human body, and it systematically dismantles it.
00:10The human body evolved over millions of years under Earth's gravity.
00:13Every system, muscle, bone, blood, vision, is calibrated for 1G.
00:18Remove that gravity, and the body begins to fall apart within days.
00:22Muscles are the first to go.
00:24In microgravity, the body does not need to work against gravity to move.
00:28Muscles, especially in the legs and core, begin to waste within 72 hours of entering space.
00:35After six months on the International Space Station, astronauts lose up to 20% of their muscle mass,
00:40even with two hours of daily exercise.
00:42Bones lose density at roughly 1-2% per month in space,
00:45ten times faster than osteoporosis in elderly patients on Earth.
00:49A six-month mission can permanently affect bone density in ways that take years to recover from.
00:53But perhaps the strangest effect is on vision.
00:55In microgravity, body fluid shifts upward toward the head.
00:58This increases pressure inside the skull, pressing on the back of the eyeballs and physically flattening them.
01:04Nearly 70% of astronauts on long missions return with permanently changed vision.
01:08Some cannot see clearly for months after landing.
01:11This condition, called spaceflight-associated neuroocular syndrome, has no complete treatment yet.
01:16The heart also changes.
01:18Without gravity to work against, the heart becomes smaller and weaker.
01:20The cardiovascular system recalibrates to a lower-demand environment.
01:24Back on Earth, it struggles to pump blood to the brain properly, causing dizziness, fainting,
01:28and in some cases, lasting cardiovascular damage.
01:31The Quran says in Surah Al-Infatar, verse 6 and 7, and I translate,
01:35O mankind, what has deceived you concerning your Lord the Generous,
01:37who created you, proportioned you, and assembled you in whatever form he willed?
01:41The human body was assembled for exactly one environment.
01:44The moment we leave it, the design reveals itself.
01:46Space does not welcome us.
01:48We were made for Earth, and Earth was made for us.
01:54We are in a table for Earth, and we are in a solid room with atmosphere.
02:02We are in a very large room with wisterous�� hurting our Moore,
02:07We have been making sure that fingernails our false cosmetics now bigger than aquatic przedstawicности.
02:07It's fee of like milanese
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