Calgaryn.com - Everything Calgary Forums (https://forums.calgaryn.com/index.php)

-   Other Entertainment (https://forums.calgaryn.com/forumdisplay.php?f=40)

-   -   How has the inside of the Earth stayed as hot as the Sun's surface for billions of years? - Yahoo News (https://forums.calgaryn.com/showthread.php?t=8103757)