Four billion years from now, the increase in Earth's surface temperature will cause a runaway greenhouse effect, creating conditions more extreme than present-day Venus and heating Earth's surface enough to melt it. By that point, all life on Earth will be extinct.
Many scientists think Earth has a maximum carrying capacity of 9 billion to 10 billion people.
But how long can humans last Eventually humans will go extinct. At the most wildly optimistic estimate, our species will last perhaps another billion years but end when the expanding envelope of the sun swells outward and heats the planet to a Venus-like state. But a billion years is a long time.
In the next 1,000 years, the amount of languages spoken on the planet are set to seriously diminish, and all that extra heat and UV radiation could see darker skin become an evolutionary advantage. And we're all set to get a whole lot taller and thinner, if we want to survive, that is.
The current world population of 7.6 billion is expected to reach 8.6 billion in 2030, 9.8 billion in 2050 and 11.2 billion in 2100, according to a new United Nations report being launched today.
A trillion is a thousand billions. There are about 8 billion people now. That would be 125 times as many people as are on Earth now. Most scientists put the “carrying capacity” of Earth at around 10 billion people.
The model, called Mindy, provides a terrifying glimpse at what people could look like in 800 years if our love of technology continues. According to the company, humans in the year 3000 could have a hunched back, wide neck, clawed hand from texting and a second set of eyelids.
Based on known risks, the really cataclysmic ones, those that might exterminate us as a species, are fairly rare. Based on what we know today, it would be very unlikely that we wouldn't be around in the year 3000. There certainly would be bad times, but some of us would get through it. That leaves unknown risks.
Humans looked essentially the same as they do today 10,000 years ago, with minor differences in height and build due to differences in diet and lifestyle.
The latest marker was passed on Tuesday, when the United Nations said the world population had reached eight billion, just 11 years after it passed seven billion. (It is an inexact number, since there is no official count, but the international organization said its projections crossed the line on Tuesday.)
In the International Journal of Forecasting study's median scenario, the global population is 11.1 billion in 2100, 10.4 billion in 2200 and 7.5 billion in 2300.
World population projected to reach 9.8 billion in 2050, and 11.2 billion in 2100. The current world population of 7.6 billion is expected to reach 8.6 billion in 2030, 9.8 billion in 2050 and 11.2 billion in 2100, according to a new United Nations report being launched today.
Age gap. Some scientists believe that within the next few decades, it could be possible for humans to live 1,000 years or more. Normally, as time passes, our cells undergo changes: Our DNA mutates, cells stop dividing, and harmful junk—by-products of cellular activity—builds up.
Heatwaves will be more frequent and long-lasting, causing droughts, global food shortages, migration, and increased spread of infectious diseases. Moreover, as the polar ice will melt, sea levels will rise substantially, affecting a large number of coastline cities and as many as 275 million of their inhabitants.
"Our results confirm prior work suggesting that if there is a maximum limit to the human lifespan, we are not yet approaching it." Two years ago a study found life expectancy has the capacity to almost double – beyond 150. It was based on blood samples from thousands of Britons and Americans.
The residents of the Moroccan site weren't quite the Homo sapiens of today; their skulls were less rounded and more elongated than ours, perhaps signaling differences between our brains and theirs. However, their teeth closely resemble those in the mouths of modern humans—and their faces looked just like ours.
October 31, 2011
October 31, 2011 • The U.N. says today symbolically marks the moment when the world's population reaches 7 billion. A little more than two centuries ago, the global population was 1 billion.
Eight billionth person
United Nations stated that they "can't predict which exact baby will push us into the next billion". Nonetheless, the Philippines' Commission on Population and Development selected Vinice Mabansag, a baby girl born in Manila, as the symbolic eight billionth person on Earth.
World Population Projections
|Year||World Population||Yearly Change|
For example in a 2004 long-term prospective report, the United Nations Population Division projected that world population would peak at 9.2 billion in 2075 and then stabilize at a value close to 9 billion out to as far as the year 2300.
between 2 and 26 billion people
Extending the UN's probabilistic population models, the paper, published in the International Journal of Forecasting, found that our population size in 2300 will likely be between 2 and 26 billion people, with a median projection of 7.5 billion.
Epimenides of Crete
According to one tradition, Epimenides of Crete (7th, 6th centuries BC) lived nearly 300 years.
1.9°C to 5.6°C
By 2100, the projected warming is between 1.2°C and 4.1°C, similar to the range projected by AOGCMs. A large constant composition temperature and sea level commitment is evident in the simulations and is slowly realised over coming centuries. By the year 3000, the warming range is 1.9°C to 5.6°C.
Others include Homo rudolfensis, who lived in Eastern Africa about 1.9 million to 1.8 million years ago (its name comes from its discovery in East Rudolph, Kenya); and Homo erectus, the “upright man” who ranged from Southern Africa all the way to modern-day China and Indonesia from about 1.89 million to 110,000 years …
The Stone Age
During this era, early humans shared the planet with a number of now-extinct hominin relatives, including Neanderthals and Denisovans. In the Paleolithic period (roughly 2.5 million years ago to 10,000 B.C.), early humans lived in caves or simple huts or tepees and were hunters and gatherers.