The first footfalls on Mars will mark a historic milestone, an enterprise that requires human tenacity matched with technology to anchor ourselves on another world.
There's a historical milestone in the fact that our Apollo 11 landing on the moon took place a mere 66 years after the Wright Brothers' first flight.
It's hard to sit back and just go through your whole career, because everything's always moving so fast. But the odd milestone is always a nice moment, and when you look at the previous players to have hit those kind of milestones, it's nice to be in that company.
Milestones aren't what I think about much.
Some books claim I have already clocked up a century of Grands Prix, but let me put the record straight. Australia will be my 100th start, and I aim to mark the milestone with a cracking performance. It could even be celebrated with a victory.
I look forward to a time, in the not so distant future, when we no longer look forward to 'firsts' as milestones women have yet to achieve, but we look back on them as historic events that continue to teach and inspire.
Whatever he does in office, no man can live up to the high expectations of the world, but we have been changed by his election. Obama's inauguration is a historic global achievement, a major milestone in the journey of a powerful nation.
June is definitely a special month for me as many of my milestone films have released in this month, but that doesn't mean I consciously choose to release my films only in this month.