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I'm sure that by now you've heard yet another Jurassic Park film will be released next year. This time around the dinosaurs run amok and
eat people, as opposed to the other films, where the dinosaurs run amok and eat
people. But it remains an intriguing topic, so I'm sure the film will do well.
Dinosaurs capture the imagination with equal parts sci-fi and horror, while
reminding us the Earth was not always ours, and one day will not be ours any
more.
Consider the recent discovery that dinosaurs nearly survived
the asteroid that drove the giant lizards to extinction 66 million years ago.
In fact, had the asteroid impacted
at a different time, give or take a few million years, then dinosaurs
likely would have survived, and mammals--and therefore humans--would have never
thrived. The asteroid touched down just as dinosaur evolution entered a fragile
period where carnivores had overhunted herbivores, meaning biodiversity and
adaptabilities were low. As one of the lead authors noted:
"If the asteroid didn't hit…there is a good chance they
would still be with us today. And if dinosaurs didn't go extinct, then mammals
would have never had their opportunity to blossom. So if it wasn't for that
asteroid, then humans probably wouldn't be here."
Naturally, this is where I remind you that life is
completely by chance. There have been five extinction events in the Earth's
brief 4.5 billion years, and scientists currently warn we're on track for number six.
Then again, once one extinction event is over the countdown for the next one
begins, so in the Sylvia Plath mindset it can be argued we're always on track
for extinction.
The only difference is that this will be Earth's first species-induced
extinction. This has been deemed the Holocene extinction, and upper estimates
have determined humans may be
responsible for 140,000 species extinctions per year. Climate change has
been beaten to death in the media, and I don't plan on spending more than this
sentence on its effects, because ultimately it's too late to stop.
That doesn't mean the human race is doomed. We're by far the
most intelligent species to have dominated the planet, and when average Earth
temperatures exceed 120° F (sometime
before the year 2300) hopefully we'll have the technology straightened out
to thrive in such conditions, along with all of the remaining animal
inhabitants.
But we'll just be delaying the inevitable, right? Many
people hope that Mars holds the secret to surviving a planetary extinction.
Most scientists agree that at some point Mars was cultivating life--bacteria and
microorganisms, but life nonetheless. At some point Mars lost its atmosphere,
but some speculate that life may continue to thrive in methane vents or carbon
dioxide geysers; NASA launches the geyser hopper lander
in 2016 to investigate.
Life is random. Postpone the climate change and await the
asteroid. There is no winning in evolutionary roulette.
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