Will humans cease to exist eventually?

In the year 2525

If man is still alive

If woman can survive

They may find

In the year 3535

Ain't gonna need to tell the truth, tell no lie

Everything you think, do and say

Is in the pill you took today

In the year 4545

You ain't gonna need your teeth, won't need your eyes

You won't find a thing to chew

Nobody's gonna look at you

In the year 5555

Your arms hangin' limp at your sides

Your legs got nothin' to do

Some machine's doin' that for you

In the year 6565

You won't need no husband, won't need no wife

You'll pick your son, pick your daughter too

From the bottom of a long glass tube

In the year 7510

If God's a-coming, He oughta make it by then

Maybe He'll look around Himself and say

Guess it's time for the judgment day

In the year 8510

God is gonna shake His mighty head

He'll either say I'm pleased where man has been

Or tear it down, and start again

In the year 9595

I'm kinda wonderin' if man is gonna be alive

He's taken everything this old earth can give

And he ain't put back nothing

Now it's been ten thousand years

Man has cried a billion tears

For what, he never knew

Now man's reign is through!

Everything will die eventually, even the universe itself.  The reason is the second law of thermodynamics.

sure, if we haven't made ourselves extinct long before then

Yes, the sun will become a red giant and swallow the earth. But this will happen in 4 billion years.

Humans will be extinct long before that. Most species last only a few hundred million years. Human have only been here for about 2 or 3 million years.

Yes that's true, and as for humans we could go extinct any day now.

There is no doubt that our Sun will eventually go through the motions of Red Giant and White Dwarf respectively

None of which bode well for Earth itself which would probably end up a lump of ash

The Sun is around Half way through its lifetime at 4.5 Billion

 Surely Man can find a way to settle all our differences and realise we are all Humans and our only home is little Planet Earth

And strive to survive

Along with that will more than likely go our Technology

OK, the Farthest a Human has Got is the Moon

And the Voyagers are doing their best to beat all distance records

But we are getting there

Especially in the Higher and Faster department

 We have got a long way to go and who knows what could happen ?

Technology has come a long way since 1900

Correct.  Stars don't have an infinite amount of fuel and eventually they run out.  It is predicted that in about 5 billion years, the Sun will swell up into a red giant because of being unable to shine by hydrogen fusion any more, and incinerate the Earth.  But the Sun will have been getting steadily hotter before that and it will probably be too hot for life before the Sun gets to the red giant stage.

We probably have 3-4 billion years, but that's a long time.  It's about as long as the Earth has already existed.

After the red giant stage, the Sun will shrink down to become a white dwarf and then slowly die out.  It's just as well the Sun is a very average-sized yellow dwarf - if it was much bigger, it'd run out of fuel quicker and explode.  But then life on Earth wouldn't have had time to evolve in the first place.

You've gotten the factual answers. The other answer is that it's nothing to lose sleep over.

Humans will be extinct sooner than you think,,and long before the sun is any issue.

Yea, about 4 billion years from now, our sun will go red giant and totally crisper earth, even Jupiter will get flamed.

The sun is predicted to become a red giant 4.5 billion years from now, thats plenty of time for humans to find a new home