It's also not using any sort of radiation, (which could destroy DNA remnants of the mummies.) "And finally, by using this Terahertz imaging, you eventually may be able to look at the substances within the mummy,for example, the embalming liquid used in the Egyptian way of embalming.

VOA: standard.2010.05.05

So the kinds of things that can be destroyed or the things would part and those sorts of things that change even it do not destroy.

但是能毁灭的东西,是能四分五裂的东西,即使不能破坏,但可以改变。

耶鲁公开课 - 死亡课程节选