also If we survive long enough, could we start evolving physically?
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Long-term habitat threats
Within a million years, the hypergiant Eta Carinae, which is 7500 light years from the Sun, may go hypernova.
In 1.4 million years Gliese 710 will be only 1.1 light years from Earth and might catastrophically perturb the Oort cloud, possibly resulting in a comet shower.
In about 3 billion years, our Milky Way galaxy is expected to collide with the Andromeda galaxy. Collisions of individual bodies will likely be scarce; however, the consequences for orbits of stars and planets are unclear, and impossible to predict for individual stellar systems.
In 5 billion years hence the Sun's stellar evolution will reach the red giant stage, in which it will expand and possibly engulf Earth. But before this happens it will already have changed Earth's climate and its radiated spectrum may alter in ways Earth-bound humans could not survive.[2]
Environmental collapses
Loss of a breathable atmosphere, for example due to an anoxic event.
Occurrence of a large-scale volcanism, possibly a supervolcano (250 million years ago, after the Permian-Triassic extinction event life on land took 30 million years to recover).[1]
Extreme ice age leading to prolonged global drought. An ice age can be a result of a nuclear winter or natural forces.
Loss of natural resources, such as mass deforestation or contamination of all fresh water.
etc etc.
No one really knows at this stage. Will it be 2012? "The Rapture"? I don't think so, personally.
Or, will it be the collapse of a suitable environment? Will we need to develop enough technology to leave for another home? Will we find a suitable way to get rid of the CO2 contaminating our atmosphere? I don't know.
Will we survive long enough to evade the hypernova of Eta Carinae?
Will we survive comets and asteroids?
In 3 billion years, will we have developed enough technology to stop the clashing of the Milky Way and Andromeda galaxies? Will we be alive in 3 billion years?
Within a million years, the hypergiant Eta Carinae, which is 7500 light years from the Sun, may go hypernova.
In 1.4 million years Gliese 710 will be only 1.1 light years from Earth and might catastrophically perturb the Oort cloud, possibly resulting in a comet shower.
In about 3 billion years, our Milky Way galaxy is expected to collide with the Andromeda galaxy. Collisions of individual bodies will likely be scarce; however, the consequences for orbits of stars and planets are unclear, and impossible to predict for individual stellar systems.
In 5 billion years hence the Sun's stellar evolution will reach the red giant stage, in which it will expand and possibly engulf Earth. But before this happens it will already have changed Earth's climate and its radiated spectrum may alter in ways Earth-bound humans could not survive.[2]
Environmental collapses
Loss of a breathable atmosphere, for example due to an anoxic event.
Occurrence of a large-scale volcanism, possibly a supervolcano (250 million years ago, after the Permian-Triassic extinction event life on land took 30 million years to recover).[1]
Extreme ice age leading to prolonged global drought. An ice age can be a result of a nuclear winter or natural forces.
Loss of natural resources, such as mass deforestation or contamination of all fresh water.
etc etc.
No one really knows at this stage. Will it be 2012? "The Rapture"? I don't think so, personally.
Or, will it be the collapse of a suitable environment? Will we need to develop enough technology to leave for another home? Will we find a suitable way to get rid of the CO2 contaminating our atmosphere? I don't know.
Will we survive long enough to evade the hypernova of Eta Carinae?
Will we survive comets and asteroids?
In 3 billion years, will we have developed enough technology to stop the clashing of the Milky Way and Andromeda galaxies? Will we be alive in 3 billion years?
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