If we can see it coming …
Posted: Sat Oct 21, 2017 11:57 am
… would we do anything about it? Let's assume that the IAU Minor Planet Center spotted a good-sized asteroid - say, 400 metres across - and initial calculations showed that it had a 50% chance of hitting the Earth in 50 years' time. It's a major - really major - project to do something about it, but given the advance warning we probably can do something about it: a solar sail, mining robots hooked to mass drivers, painting one half of the asteroid white, and so on. It would require the nations of the world to work together, but still: deflecting the rock would be an achievable, and desirable, goal.
I think - or at least I hope - we would do something about it. Sure, there would be some people who would claim it was all a hoax, got up by the astronomers to boost their research grants; some would say that 50% was good odds and we should wait and see instead of wasting money; and some would say that they wouldn't be around in 50 years so why should they pay for it? Others would claim that it was God's will; others still would claim that all we had to do was pray, or wear a particular type of hat, or stop breaking our eggs at the wrong end or whatever, and we'd be saved: the human capacity for stupidity and self-delusion is a hole with no bottom. But I'd hope that collectively, as a species, sense would prevail and enough of us would take action and we'd tip the rock just far enough to let it slip past (or, ideally, send it into another orbit altogether).
But I saw this earlier this week:
"More than 75 percent decline over 27 years in total flying insect biomass in protected areas"
and, although there's been a bit about it in the media, I don't get any sense that, collectively, we realise that we may all be looking down the barrel of a gun. Not yet, anyway. A 75%+ decline in a massive part of an ecosystem? Is that not a red alert on the same scale as the hypothetical asteroid?
I think - or at least I hope - we would do something about it. Sure, there would be some people who would claim it was all a hoax, got up by the astronomers to boost their research grants; some would say that 50% was good odds and we should wait and see instead of wasting money; and some would say that they wouldn't be around in 50 years so why should they pay for it? Others would claim that it was God's will; others still would claim that all we had to do was pray, or wear a particular type of hat, or stop breaking our eggs at the wrong end or whatever, and we'd be saved: the human capacity for stupidity and self-delusion is a hole with no bottom. But I'd hope that collectively, as a species, sense would prevail and enough of us would take action and we'd tip the rock just far enough to let it slip past (or, ideally, send it into another orbit altogether).
But I saw this earlier this week:
"More than 75 percent decline over 27 years in total flying insect biomass in protected areas"
and, although there's been a bit about it in the media, I don't get any sense that, collectively, we realise that we may all be looking down the barrel of a gun. Not yet, anyway. A 75%+ decline in a massive part of an ecosystem? Is that not a red alert on the same scale as the hypothetical asteroid?