Five Ways the World Can End

The Fox News website, on the 6th of January 2009, has an article listing 5 interesting ways the world could end.

How many ways can the world end? We can think of at least five.

Massive asteroid impact

Asteroids and comets crash into our planet all the time, with varying degrees of damage. The last big one was 100 years ago in Siberia, but in such a remote area that no one died.

Massive volcanic eruptions

An alternate theory for the low, flat, featureless Martian northern hemisphere is that huge lava flows simply erased any previous features.
Similarly, there's good evidence that the dinosaurs back on Earth were killed not by an asteroid, but instead, or additionally, by enormous eruptions in what now is India.

Nuclear war

Few people have uttered the phrase "nuclear winter" since the end of the Cold War, but it was a very real fear during the 1980s.The odds of total nuclear war between the U.S. and Russia seem remote now, and no other nations currently have the thousands of warheads it would take for such a doomsday scenario to occur. But there's always a chance of a full-scale nuclear exchange between future superpowers.

Black hole

Bottomless gravitational pits from which not even light can escape were first theorized in the 1960s, but since then they've been "spotted" throughout the universe.

The expanding sun

If all else fails, the Earth will almost certainly come to an end in about 5 billion years when it falls into the expanding sun.