Why can't our hands and feet regenerate like newts?

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Dec 23rd 2009 21:39 newt
When a lizard cuts his tale to escape from an enemy, he can regenarate it. A newt regenarates his hand and feet too. Why can't human being regenerate hands and feet like them.

I read the report of prof.Yamanaka, who is famous researcher of iPS. It
said that regenarating cells means creating cancer. During a process of evolution, human chose to lose the strong power of regenaration in order to avoid cancer. A process regenerating cells seems be similar to generating cancer.

Reptiles and amphibians are alive for just 2-3 years so cancer doesn't
have nothing to do with their lifetime. But, human are alive for more
than 70 years. Therefore human avoid cancer enen if they'd lost their
limbs for their longevity.

Uhhh, it does make a sence.