I'm fascinated by Prince Rupert's Drops, those super strong blobs of glass that look like tadpoles. We've written about them in the past here at Boing Boing, but I thought I'd share some newer videos ...

Would you ever imagine a 17th-century unbreakable ‘tadpole’- like an object to baffle scientists for over 400 years? Surprisingly, a tiny glass object has baffled curious minds for many years now.