Not to mention the fact that aquifer(s) and oil fields are both underground, in the same areas.
Both PDF’s.
A comparison shows that oil and water actually do mix. 
You have the Sooner trend in the same area as the Cimarron River, the Seminole fields along the North Canadian River, the Cushing and Stroud fields in the same area as the Vamoosa-Ada aquifer, etc.
:dubious:
Even a disease is hard to conceive of. Pathogens can finish off a species that is already on the ropes.
But to take out an intelligent species currently numbering 7 billion spread through much of the earth’s land? It would be unprecedented to the power of inconceivable. Even, IMO, with a synthetic agent.
I agree with the comet though. And the only other scenario I can think of is extraterrestrial attack.
For reasons given in other threads I find it very unlikely that an advanced sentient species would be hostile. But if they were, I’ve no doubt they’d have the means to be sure of executing every single one of us.
And they’d have anti-virus software…
You disagree that it’s hard to dent water? :dubious:
Nah. What’s at risk in the long term (barring meteors and the like) is our quality of life, not quantity.
Hmm. I would have thought that all the nuclear bombs going off at once would make most species go extinct within a year and put humans on the endangered species list, although that wouldn’t exist any more either.
I realize I’m bumping this thread by doing this, but since it appears the OP is drive-by witnessing, why don’t we just let this thread die the True Death…?
Really? I thought diversity was good?
I’d rather we did not all inter breed and become one group as I feel that would make us al a little less.
As for water, it has to be priced as a commodity on a going forward basis.
I’ll take that bet even give you any odds you like. Just so long as you send me the money now and come to me when its time to collect. 
I say we both put $5 in an interest-bearing account and then whoever’s right wins it when everything goes down…
“Nuclear winter” might plausibly finish off what the direct effects and fallout do not. Wouldn’t get all life on earth, but might get all large land animals, including any humans left.
Even from a purely secular perspective, humanity is the first species we know of that is sapient and thus forsee and prepare for extinction level events.
I’d say that, of all animals larger than a housecat, humans will probably be the last ones to go extinct. Even aside from all of our intelligence and technology, we’re just so numerous, and spread over so much of the planet. I can think of a few things that could do us in, but all of them would kill off all the rest of the large animals, too.
How do we prepare for a Chicxulub-size meteor? How do we prepare for a dangerous decline in atmospheric oxygen? We’re pretty intelligent, but that doesn’t always mean we can figure out a way to survive a planetary level extinction event. If it happens, we’re screwed. I’m certainly not prepared to state that humanity is invincible by reason of their intelligence. The universe is a very, very big, very, very UNCARING, place. We’re not special. We’re just lucky. So far.
Those events would no doubt kill huge numbers of people. Perhaps the majority.
But this is very different from an extinction. Humans are by far the most adaptable species, and there are 7 billion of us living over much of the earth’s surface (including places like the Arctic where a species with our evolutionary history should have no business being).
Then of course we have the resources to house a small subset of our population in underground bunkers, with maybe nuclear power to live for thousands of years.
Human extinction is not impossible of course, but it’s a very different animal from the kind of extinction which has happened on earth previously. Sudden climate change just won’t do it.
So I guess diversity isn’t so wonderful after all. Even if this were possible–it isn’t–why do you assume human beings won’t find “others” to hate? And whatever gave you the asinine notion that it’s physically possible for human beings to interbreed so completely that there will no longer be sub-populations with marked differently physical features?
Um, that should be “markedly different physical features.” My boss was distracting me. Something about work, I think.
And this is why the Japanese and the Koreans and the Chinese don’t hate each other, because since they aren’t visibly different they can’t figure out who to hate.
Can we put some people on another planet first?
Don’t ask me…I’m not the events scheduler.
Some meteor hits would kill all of humanity and everything else too and there’d be nothing we could do about it.