The Royal Astronomical Society - Become a Friend to RAS and get cool benefits!
Good Reads - This is my personal reading list. I update it fairly frequently because I love to read and learn.
Making Sense - Sam Harris is a neuroscientist who converses on subjects as varied as moral philosophy and religion to AI and social media. No punches pulled and every thought considered.
Skeptics Guide to the Universe - A weekly group chat on current science news, my favorite game, "Science or Fiction", and on occasion.... Meatballs
Stuff You Should Know - Well, the title says it all. Josh and Chuck have a personal and relaxed report that will entertain and educate.
Super Massive Podcast - All things space news, including what to look out for in the night sky! Izzy, Dr. Becky, and Dr. Robert Massey are there to answer your questions.
StarTalk - Neil Degras Tyson hangs with comedians to talk about space and stuff. Really fun and great way to learn!
Talk Nerdy - Cara Santa Maria interviews people in multifarious disciplines... no matter what makes your watercraft buoyant!
If you search for "citizen science" in a search engine, you will find a multitude of choices. I chose Zooniverse because of its diversity of super cool projects around the world.
Props, 3D Printing, and Electronics:
Adafruit - From dev boards to neopixels and learning guides, Adafruit has everything you need to build electronic projects.
Thingiverse - An impressive repository of 3D objects all ready to print. You can find tools, mods, and models for whatever your wants and needs.
Printables - Pretty much the same as the above, but there are models I've found here that aren't on Thingiverse... and vise versa.
PropWiki - Tricorder builds... what can I say?
Dr. Becky - Astrophysics with unbridled enthusiasm and a smile.
Adam Savage Tested - Get organized and learn from a longtime prop master.
Elina Charatsidou - Your friendly nuclear physicist.
FermiLab - All things particle physics. Even Bananas, Dr. Don Lincoln, and other explain the super tiny.
James Webb Space Telescope - Look deeper into our universe with this amazing telescope!
Marques Brownlee - He should be everyone's go to for hardware reviews... from consumer electronics to cars.
NileRed - Oh, the chemistry! Dangerous? Probably.
Stuff Made Here - The engineer who goes through ridiculous lengths to teach and entertain.
Up and Atom - Physics, scientific philosophy, and mathematics. Brain boiling stuff!
Zyla Foxlin - Fun and inspiring engineering.
Technology Connections - Technology history and commentary to help us understand the stuff around us.
Michael Reeves - Robotics, engineering, and programming to the laughable extreme. Brilliant and zany!