'Crack the Skye' is the fourth full-length studio album by American heavy metal band Mastodon, released in March 2009.
Vocalist/bassist Troy Sanders said in an interview with Stereogum, "Crack the Skye is a departure from everything we've previously recorded in the sense that we kinda strapped on our aeroshells and departed from Earth for a while, and then captained to the ethereal element of the universe and kind of slept on the roof of the world for a while to get a perspective on this record. ... Basically we're exploring the ethereal world. We're dissecting the dark matter that dominates the universe, in a nutshell."
Tracklisting
Side A:
1. Oblivion
2. Divinations
3. Quintessence
4. The Czar
i. Usurper
ii. Escape
iii. Martyr
iv. Spiral
Side B:
5. Ghost of Karelia
6. Crack the Skye
7. The Last Baron
