Virtually, of course. If you send me a note, I'll take it with me (on my iPhone) to the Challenger Deep and you'll get a printable postcard once I return to civilization. Sure, it's kind of silly, but when's the last time you sent your zeroes and ones seven miles below the ocean? Bonus points for those who follow me on Instagram. There might even be a prize of some sort. Who knows. Impossible is nothing.