If I remember it right, I saw this documentary film show on TV way way back and scientists said that the world will live up until its 3000th year! Based on the lifespan of some stars, they were able to calculate the age of the earth and eventually calculating the end of the world.

The earth, just like any star will also die. Diba pag tumingin ka sa sky pag gabi iba't ibang kinang ng stars? Pag bata pa daw ang stars its not that bright yet. But as it grows older, mas nagiging bright at lumalaki pa! Kapag malapit na mag explode, ayun it will peak at its brightest tapos mag disintegrate na. So asteroids, meteors and meteorites are formed because of these explosions.

Di na rin naman natin aabutin ang 3000th birthday ng mundo... hehehehhe Di nga tayo halos umabot ng 100th birthday natin eh! heheheh