0:09:50 > 0:09:57.
0:10:04 > 0:10:06Hi! Welcome to Science Fiction -
0:10:06 > 0:10:09where you ask questions about science.
0:10:09 > 0:10:12And we deliver the cold, hard facts.
0:10:12 > 0:10:15BUD E, what's on the menu today, please?
0:10:15 > 0:10:17Sorry, love. I keep freezing, and so I do.
0:10:17 > 0:10:20Today's question comes from
0:10:20 > 0:10:21Rory in Gorey.
0:10:21 > 0:10:22"If I yodeled in the Alps,
0:10:22 > 0:10:24"would it start an avalanche?"
0:10:24 > 0:10:28That's a good one. I better warm up the vocal chords.
0:10:28 > 0:10:29# La, la, la, la. #
0:10:29 > 0:10:30GLASS SMASHES
0:10:30 > 0:10:34An avalanche is a sudden, fast movement of snow down a slope.
0:10:34 > 0:10:37Sort of like a giant snowman on a sled. Weeee!
0:10:37 > 0:10:42They're caused naturally by rock falls, lightning...
0:10:42 > 0:10:46Or by man-made triggers such as me acting the fool.
0:10:47 > 0:10:50What's yodeling got to do with avalanches?
0:10:50 > 0:10:53Yodeling was developed by mountaineers
0:10:53 > 0:10:54to communicate in the Alps
0:10:54 > 0:10:56over large distances.
0:10:56 > 0:10:58# Yodel-lay hee-hoo
0:10:58 > 0:11:00# Yodel-lay hee-hoouagh! #
0:11:00 > 0:11:05- What about the avalanches they'll cause?- That's the whole point!
0:11:05 > 0:11:08While a yodel could in theory trigger an avalanche,
0:11:08 > 0:11:12the volume generated would not be loud enough.
0:11:12 > 0:11:14Testing, testing, one, two, three.
0:11:14 > 0:11:16AVALANCHE APPROACHES
0:11:16 > 0:11:19You're probably safe enough to try yodeling
0:11:19 > 0:11:21without causing an avalanche.
0:11:21 > 0:11:25Sure that's just a load of old science # Fi-i-ction! #
0:11:29 > 0:11:33Yodel, wasn't he the small, little fellah in Star Wars, wasn't he?
0:11:33 > 0:11:35Very wise. Great film.