Ridiculous. There's a lot more space in this universe than just planet Earth.

Unfortunately, there is only a small push for extra-planetary life. The fat cats on top would much rather sit back, and wait for an extinction level event.

Also, if humans do go extra/multiplanetary, most religious apocalypse' are MOOT.

Doesn't solve the problem. Suppose I have three kids, then get immortalized and sterilized. Each of my kids does the same...