SpaceX is planning an ambitious ramp up of launch cadence with 5 x Falcon 9 launches planned in April.
The last of which may demonstrate the final Block 5 version of the Falcon rocket. It will have a different paint livery (black interstate) and will incorporate all the learnings from the recovered boosters. It has extra reentry heat shielding for the engines, a special paint on the outside and the net Titanium Grid fins. The block5 is designed for rapid reuse with minimal servicing aside from refuelling for 10 launches but it should be capable of 100 reuses before scrapage. SpaceX like to tweak each launch and try new hardware etc but NASA has mandated that they make no changes to the rocket for 5 successive launches before they will certify it as human capable.
All being well we will see humans fly on this by the end of the year or early 2019.
I don’t think you need trees for oil formation, its more algae and plankton that are important
Mars is not geologically active today but its very clear that is was in the past, Olympus Mons is the largest Volcano in the Solar system, its so large Galileo might have been able to see it, we also know that Mars had oceans and an atmosphere, so all the building blocks for oil were once present, therefore IMO its possible that Mars could have oil deposits
And thats before we start to wonder about Titan
Yes but the Methane can clearly also be burned in an engine as back up, it would be foolish to rely on just one system
Can earth based organisms successfully procreate and raise healthy off-spring on a planet with 38% of the gravity of earth? What effect will the lack of Sun exposure have on Martian Humans? There has been some science done on mammal babies in space and then brought back to Earth but none on long-term off-Earth living.