Liquid Nitrogen

[mete]

http://www.gizmodo.co.uk/2014/01/this-leech-can-survive-for-24-hours-in-liquid-nitrogen/

I'm confused , are eta carbides actually leeches ??

 

[Atlas Knife Company]

And that's why we use leeches instead of nightcrawlers when fishing for walleye and northern!

PS Waters bears make me giggle.