Spelunkers CaveChronicles and the ActionAdventureTwins played a wall of Aragonite and gypsum needle cave crystals like a harp.

The members of 40 Fingers played a vibrant, multi-layered medley of Michael Jackson songs on four acoustic guitars.

CrazyFunnyStuffCFS shared a really amusing compilation of lazy yet innovative cats drinking their water while laying down.

Weird History Food dug up the uneasy history of the Easy Bake Oven, a working toy toy oven released in 1963 that is still popular today.

One of the ROVs traveling with the NOAA ship Okeanos Explorer, captured amazing footage of a rare "Big Red" jellyfish.

Kevin Bacon aptly serenaded a very reticent alpaca on his farm named Sharona with a ukulele cover of the 1979 earworm hit "My Sharona".

Andy Riesmeyer of KTLA spoke with George Geary about the secret, off-menu items at In-N-Out Burger in Baldwin Park, Los Angeles.

Zorian Clayton of the Victoria and Albert Museum, shared some wonderful examples of early Valentine's Day cards from the 19th century.

Casey Neistat shared his personal dream of running a marathon in less than three hours and the effort he put in in making come true.

Max Miller of Tasting History prepared "bath buns", sweet rolls made with caraway that were popular in Jane Austen's London of the 19th century.