because Chuck Norris decrees it so.
A Timelord can regenerate 12 times and have 13 bodies, the 13th time instead of regenerating he is supposed to die.
Eventually yes, he will regenerate into the twelfth Doctor.
They regenerate themselfs
Only from seeds. No if it is dead, but it doesn't die in winter
frogs do regenerate
Missing tails are no cause for alarm; anoles can regenerate their lost tails
the answer is no but they can regenerate their tails
yes they can regenerate. Marine sponges are multicellular animals that can regenerate from single cells.
The phoenix's tears have healing powers, and they regenerate as an egg after they die.
No, ovaries do not regenerate. Unlike some tissues in the body, ovaries do not have the ability to regenerate or regrow once damaged.
No, unlike smaller reptiles and amphibians, crocodilians do not have the ability to regenerate lost limbs. I would assume they rarely ever need to though, not many things are able to take on crocodiles, especially the Nile and Estuarine varieties.
to die is to live no longer, you cannot regenerate when you die, your heart no longer beats, your brain is no longer active, you'd have no life, ever lean or lay on your arm too long and theres no blood that goes into it? and all you feel is numbness and its heavy? well, take that as an example of what your body may feel like after your dead. The only thing you'll regenerate after your casket pops open from being in the ground a very long time, are daisy's and other flowers, sometimes the occassional tree, depending on where your grave is located.....