Posts Tagged With: Earth

Destroyer of Worlds

“It is likely that hundreds of thousands of bodies, each capable of yielding a multimegaton explosion on Earth, are orbiting within the [Taurid meteor] stream.” – Victor Clube and Bill Napier, Cosmic Winter

Regular meteor showers are the periodic reminder we live in vast universe. For a few nights, they draw people away from their distractions to look at the heavens like their ancestors once did. What if these little fire balls have a darker history?

In Late October, the Taurid meteors often provide a little show — the Halloween Fireballs. These are the remnants of a fragmented comet that came apart 10,000 years ago. Lesser known are the June (or Beta) Taurids, when Earth passes through another part of this debris field. These are unseen since they occur during daylight hours.

They also may be the source of humanity’s near extinction.

As Earth emerged from the last Ice Age, something catastrophic interfered with climate cycles that persisted for hundreds of thousands of years. One result was the stable climate we now live in, which is a good thing, right? It is, unless the old cycles reassert themselves, or another disaster befalls us.

The bad part is the strong evidence comet fragments pummeled Earth during this apocalypse, the main impacts landing in North America, causing destruction around the globe. Humanity’s progress was set back centuries, if not more.

Could it happen again? Consider these other celestial events occurring during the June Taurids:

  • On June 25, 1178, an impact on the Moon created the massive Giordano Bruno crater.
  • On June 30, 1908, a fragment exploded over Tunguska in Russia, destroying 2000 square kilometers of forest. A few hours earlier, and Moscow would have been destroyed.
  • In late June 1975, a swarm of objects impacted the Moon.

Slightly different timing or trajectories, and these events could have had devastating effects on Earth. We aren’t out of the woods yet. Massive comet fragments are likely still floating in our orbit. Difficult to detect, but not impossible. Why isn’t planetary defense a higher priority, if not the highest? Why isn’t this a common cause among all humans?

Many stories come down to us telling of the time fire rained down from the heavens. Will we ever heed their warnings?

So next time you watch for meteors, or look to the sky every June, imagine what might be lurking in the darkness. Destroyer of worlds…

Categories: Prehistory | Tags: , , , , , , , , , , , , | 1 Comment

Eclipses and Cosmic Purpose

Hundreds of moons, planets and other bodies in the Solar System, and  only ours — Earth and the Moon — have perfect solar eclipses.  Astronomers have long noted this strange phenomenon, and the unlikely parameters that cause it. Not only that, but they happen to occur in a time in Earth’s history where they can be observed.  Astronomer John Gribben writes:

Just now the Moon is about 400 times smaller than the Sun, but the Sun is 400 times farther away than the Moon, so that they look the same size on the sky. At the present moment of cosmic time, during an eclipse, the disc of the Moon almost exactly covers the disc of the Sun. In the past the Moon would have looked much bigger and would have completely obscured the Sun during eclipses; in the future, the Moon will look much smaller from Earth and a ring of sunlight will be visible even during an eclipse. Nobody has been able to think of a reason why intelligent beings capable of noticing this oddity should have evolved on Earth just at the time that the coincidence was there to be noticed. It worries me, but most people seem to accept it as just one of those things.

Even if we brush this off as coincidence, as some have tried to do, there is another layer to this. Many of the interconnected factors that allow the eclipse to occur, also allow life to exist on Earth. Continue reading

Categories: Critical Thinking, Nature | Tags: , , , , , , , , , , , , | 4 Comments

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