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We've been looking for Dark Matter for decades.

How do we know it's even there? Could there be some other explanation that nobody has thought about yet?

Humans are always trying to understand the world in a deeper and more profound way. It could be that dark matter doesn't exist at all, and just represents a big unknown about the universe that we haven't yet figured out. That we've thought up this concept of "dark matter" doesn't mean it actually exists in the world, and it could turn out to be some elaborate illusion we manifested out of our limited understanding of physics.

"A physicist always wants to know the why of the why of the why, and doesn't really care [about] what you can do with it. [A physicist] just wants to understand how things work."
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"it's harder to find mid-size asteroids, some of which are still big enough to cause continent-wide damage. And when you consider even smaller objects that could wreak regional and city-scale devastation, the threat increases substantially.

"In 1908, an asteroid just 50 meters wide exploded over Tunguska, Russia and leveled more than 2,000 square kilometers of forest. If a similar event happened over a populated region like New York City, it could cause "millions of casualties," the report says."
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15 years ago today, the world watched as one of the deadliest human spaceflight disasters in history unfolded on national TV. #ColumbiaDisaster

Read: https://goo.gl/XDbX8n
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Supermassive

Maybe we got something wrong. A recent survey has concluded that there are a lot more huge stars than previously thought—especially on the bigger end of the spectrum. This implies that something might be wrong with our models of star formation—and that supernovae occur far more often than previously suspected.

Read more: https://goo.gl/YuRhSs
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Extinction

Here's a hugely informative talk on the gradual loss of biodiversity, the degradation of our environment, and the unsustainable course that humanity is presently on. At our current rate of resource consumption, we would need the resources of 1.75 Earths to reach a point of sustainability...

#Biodiversity #Environment #Climate #Sustainability #Extinction
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"The Romans also connected societies by land and by sea as never before... the decisive factor in Rome’s biological history was the arrival of new germs capable of causing pandemic events." – via +Aeon
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JURASSIC PARK!

Scientists say the chances of extracting any dinosaur DNA from ticks that fed on dinosaur blood is extremely low. But 'extremely low' does not mean 'zero'.

Still, though, they probably won't be able to get dinosaur DNA from any type of fossil. But you never know...

Read about it here: https://goo.gl/cXhQvJ
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Hiroshima survivor shares her perspective on Nuclear Weapons

Although 122 nations have signed the United Nations Treaty on the Prohibition of Nuclear Weapons, that's not nearly enough. Notable absentees include all of the nations which currently possess nuclear arms (a total of 14), all of NATO (29 member states), and several of the United States' close allies (like South Korea).

Most ironically of all, Japan has abstained from signing the treaty despite being the only nation in the world to have had nuclear weapons used against them (and possessing no nukes of their own).

How can we possibly expect other nations to not acquire nuclear weapons while we ourselves refuse to ban their possession?

#Hiroshima #Survivor #Nuclear #Weapons #Prohibition #Treaty #United #Nations
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Right now, the Bitcoin network uses 100,000 times more processing power than the world's top 500 supercomputers combined. That's a lot of energy. If Bitcoin energy usage (and value) continues to increase at its current rate, by 2020 just operating the Bitcoin network will require as much energy as is currently produced by the entire world.

This bubble's gotta pop at some point.
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If this happens, it will probably go down as the biggest win for the human race of the entire 21st century. #Nuclear #Disarmament #Atomic #Bomb #Treaty
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