Starlink created by Space X, Elon Musks company. They have 6000 (I think) small, low orbit satellites that are aiming to create a network that provides high-speed internet connectivity around the globe. This should be available in about a year and has the potential to connect everyone on the globe. 50% of the world does not currently have internet.
Rotary detonation engines (PDEs). It’s a new design for jet engines where the fuel detonates (a supersonic explosion) instead of just burning steadily. The airforce has already invested a lot of money into it since it could increase the engine efficiency by 25% or even higher.
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