Interestingly enough they have made pretty much no progress at all. Cyrogenics, bionics, none of it works in regards to death.
We're born to die, s'all there is to it.
According to Scripture we were born to "LIVE" live happily.
Adam and Eve and descendants were to procreate only until the earth was full or populated, Not overpopulated - Genesis 1:28
If Adam had Not broken God's Law then Adam would be alive here on earth today.
Because Adam lost his healthy human perfection, then father Adam passed down to us his unhealthy state which always ends in death.
The only way to get rid of that inherited unhealthy state leading to death is for someone to come along and undo the damage father Adam brought upon us.
That is where Jesus enters the picture for us. Both Adam and Jesus started out sinless in a perfectly healthy state.
Adam failed in showing love. Whereas Jesus' integrity was tested in different difficult circumstances under suffering.
Both suffering Job and suffering Jesus were faithful under adverse conditions thus proving Adam could have kept integrity to God and His Law.
Also, Jesus' faithful death takes the place of our death. That means Jesus opened up the way for us to come back to life - Acts of the Apostles 24:15
Not to a sickly life but as Revelation 22:2 mentions earth's nations will be healed.
So, under Jesus' coming 1,000 year governmental rulership over earth: No one will say, " I am sick....." - Isaiah 33:24
That means No one will die. Enemy death will be No more - 1 Corinthians 15:26; Isaiah 25:8
As far as populating other planets, that remains to be seen, but earth will Not become overpopulated or over full.