How many people has lived on earth alltogether?
540323
Demographers have come up with estimates ranging between 69 billion and 110 billion humans. This gives us a spread of 41 billion, a pretty formidable margin of error. \n\nA complication, among scientists at least, is that we do not know precisely when our primate ancestors became human. Many researchers have arbitrarily settled on one million years ago, even though our own subset of the genus Homo, H. sapiens sapiens, did not emerge until around 40,000 years ago.\n\nIf the paleolithic crowd (1 million years to 25,000 years ago) strikes you as too crude for admission to the communion of saints, subtract 36 billion or so from the figures above.
1089748
no, but it would be very stupid to assume that Earth is the only planet that can sustain and contains life.  the universe is gigantic.  i don't think any human can truly grasp how vast the universe is.
856288
.World population\n\nMap of countries by population —showing the population of the People's Republic of China and India, the only two countries to have a population greater than a billion. (See List of countries by population.)\nThe world population is the total number of humans alive on the planet Earth at a given time. As of late 2006, the world population reached 6.5 billion.[1] In line with population projections, this figure continues to grow at rates that were unprecedented prior to the 20th century.
1111667
Projections have the world population hitting six billion sometime around the middle of next year. Beyond that, it's hard to give you an exact answer. We can tell you that there are approximately 25 more people in the world than there were when you started reading this paragraph. That's because current research indicates that about five people are born every second, while two people pass away, leaving us with a population rate of three new humans per second.\n\nhere I found this site also... this is better and this can show your 8 year old alot more!  Have fun!\n\nhttp://www.census.gov/population/www/popclockus.html
254176
Approximately 6 and a half billion.
572441
Every day 400000 babies are born, 150000 people die for a net increase of 250000 human beings a day. So it is approximately 3 to 1 as you guessed.\n\nCurrently the worldpopulation increases with 90 million a year, or about 1.4%. We are crowding 6500 million people on the planet.
371986
The entire world plus animals\n6.5 billion people. Noobs are so high maintanence
359253
There are approximately 1.6 to 1.7 million described species on Earth. Estimates exceed 100 million species, but the difficulty lies in our ability to search for and describe them all (some even estimate there are over 100 million bacteria species alone and that our techniques, and interest, to find them limits such numbers).
1044962
It has recently been suggested that life on earth began much earlier than once thought. The earth is around 4.5 billion years old. But life is thought to have started just 500 million years into its existence - not long after it was first able to really support life.
481669
10,756 (nearly 29 and a half earth years).\n\nI knew that knowing useless fact would one day come in useful!!
499665
i guess 1 billion people
680635
Every day 400000 babies are born, 150000 people die for a net increase of 250000 human beings a day.\n\nCurrently the worldpopulation increases with 90 million a year, or about 1.4%. We are crowding 6500 million people on the planet.
355430
The Earth has been hit thousands of times.
211202
Now, in your main question, you use the generic term "ones," but in the details you use "human beings."  It is possible we are the only human beings, since that refers to a specific pattern of physical and mental processes.  But the only Ones, as in living, conscious, self-aware beings?  That would be statistically amazing, given how many stars there are, and how many planets revolve around our star.  Science fiction has long estimated the number of habitable planets, the number which are in fact inhabited, etc.  I can't say how many, but I'd be truly amazed if we are the only ones.
849806
Its 6 billion, I think. You don't you go around the world and count 'em .
165445
there are 7241.00098723 earths. Period.
579078
Thousands, millions, billions...\nAt least more then, let's see: me, you and those 6 answerers, so that makes... 8