Two stars may collide and light up night sky in 2022

Two stars may collide into a stunning “red nova” in 2022 (or a few months earlier, most probably between September 2021 and September 2022), and for a few weeks become one of the brightest objects in Earth’s night sky, scientists predict. When two stars merge, they increase in brightness 10 thousandfold.
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What would happen if humans became extinct?

In the last few thousand years, humans have had a powerful impact on Earth. Within a geological blink of an eye, we exploded out of Africa to colonize virtually every inhabitable space on the planet. We dammed the rivers, we domesticated animals, deforested many areas, changed the chemistry of atmosphere and he seas… list goes on. But, what would happen if humans suddenly become extinct in the future?
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9 Recently Lost Natural Wonders

The Earth is always changing. “The only thing that is constant is change”, as Heraklitus (c. 535 – c. 475 BC) the pre-Socratic Greek philosopher once said. Unfortunately, things do not always happen the way we would have wanted. Here nine of natural wonders that has been lost in the recent centuries or even decades.
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If Andromeda Galaxy were brighter, this is what we’d see

Andromeda Galaxy is the farthest object in the sky that we can see with the naked eye. But if you don’t know where to look, you won’t notice it. But if it were much more brighter, its appearance in the sky would be sensational. The moon is a good reference about what we’d see in the image below:
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The Size Of Earth Compared to Other Planets and Stars (and the Universe)

When it comes to big numbers, very big numbers, human brain is weak. In fact, our brains cannot deal with the really large numbers. That’s why when the subject is Earth, planets, Solar System, galaxies, and in general, the Universe, we cannot truly conceptualize the things. A lot of people think we’re “conquering” the space (we are far, far away from that – and maybe we never will), or the “aliens” are regularly visiting Earth, as if it is just an hour’s drive from there. In fact, these people don’t truly understand what are they talking about, how big is the universe, how far the stars are, and how the Earth is a tiny, tiny spot in a vast space we are still striving to understand.
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Human Population Through Time (Video)

The Earth is getting more crowded every single day. As of August 2016, the world population was estimated at 7.4 billion. Our planet is already overpopulated, and despite the growth of the population begun slowing, the situation will be worse: the United Nations estimates it will further increase to 11.2 billion in the year 2100.

Here is a video published by the American Museum of Natural History showing the World’s population through time.
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