Scientists are constantly studying the smaller, more common avalanches, to try to understand what causes them.

科学家们一直在研究更小的、更常见的雪崩，试图了解是什么导致这些雪崩。

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What causes them to become addicted?

是什么使他们上瘾了呢？

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What is an earthquake and what causes them to happen?

什么是地震，造成地震发生的原因是什么？

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What holds them together ? and what causes them to fall apart?

什么使政体确立,又是什么导致政体垮台？

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But there is still controversy about what causes them, and that will not be resolved until the gamma-ray window is clear again.

ECONOMIST: A new gamma-ray telescope has just been launched

It is not even clear what causes them, let alone anything else.

ECONOMIST: Mad cows

What is worse is what their own morally relative blindness causes them to do.

CENTERFORSECURITYPOLICY: Moral relativism and jihad