200 years ago, we hardly knew anything about our Universe on cosmic scales. Today, there's so much that we know. Here's how we arrived.

ALT: Scrooge McDuck: Everyday I'm Hustling

Zim Cares partners with trusted organizations to provide free classroom programs, posters, activities, contests, and student engagement tools. Zim Cares provides free, ready to use educational program...

Alt: Dory's Iconic 'Just Keep Swimming' Moment

ALT: Jimmy Fallon Says 'Ew!'

Alt: Judy Hopps: It's Called A Hustle Sweetheart

ALT: Rose Blackpink Makes Heart Sign & Smiles

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ALT: a man sitting on a couch with a black shirt on that says fox

ALT: a woman wearing a santa hat is holding a man 's hand and says `` stop trying to make fetch happen '' .

ALT: a man wearing a hat says i 'm really kinda knowledgeable .

ALT: a woman in overalls and a pink shirt waves her hand in front of a blue striped background that says bye bye friends