A knowledgeable YouTuber on a range of space & technology topics
Let me suggest this highly under-watched, under-valued YouTube channel to all you science geeks. Isaac Arthur makes amazingly detailed and insightful videos on the topics of space exploration & travel, the possibility of alien civilizations, terraforming, and a variety of related things.
https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/videos
He has a speech impediment and some people might find him hard to understand (I certainly don't), that's why he provides closed captions. I hope you enjoy his episodes!