In addition to being the birthplace of humanity and the cradle of human civilization, Earth is the only known planet in our Solar System that is capable of sustaining life.As a terrestrial planet, Earth is located within the Inner Solar System between between Venus and Mars (which are also terrestrial planets).Within 1 billion years, all water will be gone and the average surface temperature will reach 70 °C (158 °F).
In 500-900 million years, increased surface temperatures will accelerate the inorganic CO² cycle, reducing it to lethally low levels for plants.
This will lead a lack of vegetation, followed by a loss of oxygen in the atmosphere, triggering a cycle of extinction over the course of several million years.
Nevertheless, given that it is where all terrestrial life as we know it originated, coupled with the fact that it is the only habitable planet known to us, Earth is likely to remain our spiritual and physical home for many eons to come.
One can only hope that by the time it does become uninhabitable, we will have long since gone extinct, or evolved to the point that we no longer have to worry about dying along with it.
A new analysis of those bones concludes that the mastodon was butchered by humans.
But it adds that the the butchering took place at an astonishing time: 130,000 years ago — well more than a hundred millennia before humans are thought to have arrived in North America.Viewed from the celestial north pole, the motion of Earth and its axial rotation appear counterclockwise.From the vantage point above the north poles of both the Sun and Earth, Earth orbits the Sun in a counterclockwise direction.“This discovery is rewriting our understanding of when humans reached the New World,” said Judy Gradwohl, president and CEO of the San Diego Natural History Museum, in a statement to the press.“The evidence we found at this site indicates that some hominin species was living in North America 115,000 years earlier than previously thought.Some experts, however, are greeting their claims with robust skepticism.