Space & astronomy
Have you ever had the feeling that there's something bigger out there, something you can't see? Well there is – it's called Dark Matter. Dark matter is spread throughout...
LIAM: Hey, Brad. Got another letter. This one's from Thomas from Helsinki, which I recently found out is a real place. So, let's see what it says. Ah, blue. Love the color blue. Dear...
JANET PETRO: Well, technically, space or outer space is a big void. It's a vacuum that exists beyond Earth. And even though space is a vacuum, it's not empty. Outer space contains...
