History Photographed on Instagram: "This is the phenomenon of astronauts temporarily having difficulty readjusting to Earth's gravity after spending time in space.⁠ ⁠ This condition, which is called orthostatic intolerance, is a condition where the bodies struggle to adjust to Earth’s gravity in an upright position. ⁠ ⁠ In space, their bodies adapt to microgravity, which weakens leg muscles and causes cardiovascular changes. ⁠ ⁠ Back on Earth, standing up can lead to a sudden drop in blood press

Explaining The Universe on Instagram: "Follow (us) @ExplainingTheUniverse to learn something NEW every day 🧠💫 The Dead Sea is a unique salt lake located at the border of Jordan and Israel, famous for being one of the saltiest bodies of water on Earth. It sits in the Jordan Rift Valley, more than 400 meters (1,300 feet) below sea level, making it the lowest exposed point on land. Its salinity is about 10 times higher than typical ocean water, which makes it impossible for most organisms to surv

Explaining The Universe on Instagram: "Follow (us) @ExplainingTheUniverse to learn something NEW every day 🧠💫 A dam is a barrier built across a river or stream to control the flow of water. By holding back water, dams create reservoirs that can be used for drinking water, irrigation, hydroelectric power generation, flood control, and recreation. There are several types—such as gravity dams (which rely on their weight to resist water pressure), arch dams (curved, transferring force into the val

Explaining Nature on Instagram: "Baby meerkats, known as pups, are some of the most charming and social animals in the animal kingdom. Born underground in burrows, usually in litters of three to seven, they enter the world blind, hairless, and completely dependent on their family. For the first few weeks, they stay hidden below ground, nurtured by their mother and protected by the safety of the group’s elaborate tunnel system. What makes meerkats unique is their cooperative family structure. A d