Please don't look at the stars!!

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In a nutshell, the theory suggests that we change things simply by looking at them and theorists have puzzled over the implications for years.
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But the bad is that quantum theory says that whenever we observe or measure something, we could stop it decaying due what is what is called the "quantum Zeno effect," which suggests that if an "observer" makes repeated, quick observations of a microscopic object undergoing change, the object can stop changing - just as a watched kettle never boils.

In this case however, it turns out that quantum mechanics implies that if an unstable system has survived for far longer than the average such system should, then the probability that it will continue to survive decreases more slowly than it otherwise would. By resetting the clock, the survival probability would now once again fall exponentially.
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So: in the forest, a tree can actually stop falling if you watch it too closely... O_o

[from: http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2007/11/21/scicosmos121.xml&CMP=ILC-mostviewedbox]