With the extinction of life, 2.8
India will overtake China as the most populated country on Earth. Nigeria will overtake the US as the third most populous country in the world. The fastest-growing demographic will be the elderly: 65+ people will hit one billion by 2030. We will need to figure out ways of how to accommodate 100+ people at work.
When cyanobacteria evolved at least 2.4 billion years ago, they set the stage for a remarkable transformation. They became Earth's first photo-synthesizers, making food using water and the Sun's energy, and releasing oxygen as a result.
French researchers have discovered that life was already moving on our planet earlier than first thought — now thought to be 2.1 billion years ago. Previously, early life forms were said to date back 1.5 billion years.
There is such thing as too much oxygen
Micro-organisms exhausted the nutrients they needed to create oxygen, which knocked the Earth's atmosphere off-kilter. This led to an “enormous drop” in the biosphere – the amount of life on Earth. Scientists weren't sure just how drastic the drop was until now.
At the end of the Permian, conditions became unsuitable for most life and about 95% of marine species were eliminated as well as 70% of terrestrial species in a very short period of time, in geologic terms.
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.
At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to cool and oceans of liquid water formed.
Earth may have been a 'waterworld' without continents 3 billion years ago, study suggests. Around 3 billion years ago, Earth may have been covered in water – a proverbial "waterworld" – without any continents separating the oceans.
TO THE LAST 20,000 YEARS
Last Glacial Maximum- a time, around 20,000 years ago, when much of the Earth was covered in ice. The average global temperature may have been as much as 10 degrees Celsius colder than that of today. The Earth has a long history of cycles between warming and cooling.
The name Earth derives from the eighth century Anglo-Saxon word erda, which means ground or soil, and ultimately descends from Proto-Indo European *erþō. From this it has cognates throughout the Germanic languages, including with Jörð, the name of the giantess of Norse myth.
The First Humans
One of the earliest known humans is Homo habilis, or “handy man,” who lived about 2.4 million to 1.4 million years ago in Eastern and Southern Africa.
So how did Earth's atmosphere get its oxygen? The simple answer is that early microorganisms produced it using a process you may have learned about in elementary school: photosynthesis. Photosynthesis is the process by which plants and other organisms use sunlight, water, and carbon dioxide to produce energy.
According to a US report, the sea level will increase by 2050. Due to which many cities and islands situated on the shores of the sea will get absorbed in the water. By 2050, 50% of jobs will also be lost because robots will be doing most of the work at that time. Let us tell you that 2050 will be a challenge to death.
Bottom line: New evidence from Harvard suggests that – a few billion years ago – Earth was a true water world, completely covered by a global ocean, with little if any visible land.
Approximately 300,000 years ago, the first Homo sapiens — anatomically modern humans — arose alongside our other hominid relatives.
Earth's water is 4.5 billion years old, just like the article's title says. At least some of it is. According to the authors, planetesimals probably delivered it to Earth, but exactly how that happens isn't clear. There's a lot more complexity that scientists need to sort through before they can figure that out.
Adam is the name given in Genesis 1-5 to the first human. Beyond its use as the name of the first man, adam is also used in the Bible as a pronoun, individually as "a human" and in a collective sense as "mankind".
Washington, DC—Our planet's water could have originated from interactions between the hydrogen-rich atmospheres and magma oceans of the planetary embryos that comprised Earth's formative years, according to new work from Carnegie Science's Anat Shahar and UCLA's Edward Young and Hilke Schlichting.
Miller and a few other scientists began to suspect that life began not in warmth but in ice—at temperatures that few living things can now survive. The very laws of chemistry may have favored ice, says Bada, now at the Scripps Institution of Oceanography in La Jolla, California.
More reproduction followed, and more mistakes, the process repeating over billions of generations. Finally, Homo sapiens appeared. But we aren't the end of that story. Evolution won't stop with us, and we might even be evolving faster than ever.
They would still probably be small, scrawny, and very generalized. But instead, the mammals were able to evolve and diversify and, well, ultimately, millions of years later, become some humans. So perhaps we would not have been here if it weren't for this extinction event 65 million years ago.
Endangered Species: Humans Might Have Faced Extinction 1 Million Years Ago. New genetic findings suggest that early humans living about one million years ago were extremely close to extinction.