1
00:00:00,700 --> 00:00:07,066
(MUSIC) 
JOAN CARTAN-HANSEN, HOST:

2
00:00:07,066 --> 00:00:09,867
THE EARTH'S CRUST IS MADE 
UP OF A NUMBER OF TECTONIC

3
00:00:09,867 --> 00:00:10,600
PLATES.

4
00:00:10,600 --> 00:00:14,166
VOLCANOES ARE TYPICALLY LOCATED 
WHERE THOSE PLATES MEET.

5
00:00:14,166 --> 00:00:17,166
THREE QUARTERS OF ALL ERUPTIONS 
HAPPEN UNDERNEATH THE OCEAN

6
00:00:17,166 --> 00:00:20,433
WHERE THE OCEAN'S PLATES ARE 
SPREADING APART.

7
00:00:20,433 --> 00:00:23,700
THE TALLEST VOLCANO ON EARTH IS 
HAWAII'S MAUNA KEA AT OVER FOUR

8
00:00:23,700 --> 00:00:25,433
THOUSAND METERS.

9
00:00:25,433 --> 00:00:28,633
IF YOU MEASURED IT FROM ITS BASE 
UNDER THE OCEAN TO ITS PEAK, ITS

10
00:00:28,633 --> 00:00:31,367
HEIGHT IS MORE THAN 10 THOUSAND 
METERS.

11
00:00:31,367 --> 00:00:33,800
THAT'S HIGHER THAN MOUNT 
EVEREST!

12
00:00:33,800 --> 00:00:37,066
BUT THE TALLEST VOLCANO IN THE 
SOLAR SYSTEM ISN'T ON EARTH.

13
00:00:37,066 --> 00:00:38,633
IT'S ON MARS.

14
00:00:38,633 --> 00:00:42,900
OLYMPUS MONS IS 16 MILES HIGH 
AND 374 MILES ACROSS.

15
00:00:42,900 --> 00:00:46,867
IT'S SO BIG; IT WOULD COMPLETELY 
COVER THE STATE OF ARIZONA.

16
00:00:46,867 --> 00:00:49,800
BACK ON EARTH, IF YOU WANT TO 
AVOID VOLCANOES, YOU HAVE TO GO

17
00:00:49,800 --> 00:00:50,900
TO AUSTRALIA.

18
00:00:50,900 --> 00:00:53,867
THAT'S BECAUSE THERE ARE NO 
ACTIVE VOLCANOES THERE BECAUSE

19
00:00:53,867 --> 00:00:57,266
AUSTRALIA SITS IN THE MIDDLE OF 
A TECTONIC PLATE.

20
00:00:57,266 --> 00:00:59,734
FOR MORE INFORMATION ABOUT 
VOLCANOES, CHECK OUT THE SCIENCE

21
00:00:59,734 --> 00:01:00,900
TREK WEBSITE.

22
00:01:00,900 --> 00:01:04,433
YOU'LL FIND IT AT 
IDAHOPTV.ORG/SCIENCE TREK