Jing-Jin-Ji, A MEGALOPOLIS | China’s Future MEGAPROJECTS: Part 1

Jing-Jin-Ji: China is in the midst of a construction spree unparalleled in human history. These are the Megaprojects that will lift China into the future. China wants to make its capital, Beijing, the center of the world’s largest supercity, by merging three provinces into one continuous megalopolis of 130 million people.

Why It’s HARD To Land on Mars

This video is about why it’s harder to successfully land spacecraft and landers and rovers on Mars than on Earth, or Venus, or the Moon, or Titan, or asteroids. It all comes down to atmospheric density! When there’s no atmosphere, you can do a powered descent in a flimsy tinfoil spacecraft like the Lunar Module, and when there’s plenty of atmosphere you can do an unpowered descent via heat shield and parachutes like the space shuttle, Apollo command module, Soyuz, Huygens, etc. But on Mars with its thin air, you have to do both powered & unpowered descent, getting the worst of both worlds.