Hey team! How the heck can we measure the curvature of the entire observable Universe, and why is it even surprising that it looks totally flat? Let's talk about it! Related Videos: Cosmological inflation EXPLAINED: https://www.youtube.com/watch?v=ddpPSmWEj3s How inflation solves the horizon problem: https://www.youtube.com/watch?v=qQqROplzJTQ Where are all the monopoles?: https://www.youtube.com/watch?v=K_Og9LI4PPM What is a black hole?: https://www.youtube.com/watch?v=olKiYWEhWn8 If there is some cool topic in physics you think we should learn about together, leave a comment down below! Until next time, stay safe. Please consider subscribing if you enjoyed the video, and you can also find me on Twitter: https://twitter.com/chrisdpattison