human become extinct???

.+.masquerade.+. wrote:

BabyTsukasa wrote:

psylancer wrote:Or, we can make a cryogenic chamber and fast forward to the world we know as futurama. :D
Just saying...

Preservation mammal by cryogenic is rather hard, high water content means dehydration needed, which means death to most cell....i'm not sure about the latest technology...but last time, pouring liquid nitrogens to my bacteria for storage at -80 degree celcius gives me slight idea why it doesn't work well with animal cells...but recently they stored tissues like embryonic cord in liquid nitrogen for future used....i think the future can be promising or shall i say...freezing?

Can we keep people alive by freezing them? Can people suffering from incurable diseases be put into deep-freeze until such time as a cure is found, and then revived? The simple answer is no.

Interestingly, human life can survive sub-zero temperatures in a metabolically inactive dormant state. Sperm, eggs and even embryos kept in liquid nitrogen at -196 °C, can be thawed and used successfully in infertility treatment.

However, it is not possible to freeze people and bring them back to life. One of the main problems is that the formation of ice crystals destroys the cells, but a critical factor in maintaining life seems to be the timescale involved: ice crystals take time to develop. When very small samples are immersed in liquid nitrogen, the freezing process happens rapidly: the molecules simply 'lock' in position and ice crystals do not form. The cells and organelles are not damaged, and, when thawed, function normally. This technique, however, only works with tiny samples of tissue, which freeze instantly and entirely.

(P/S: If we developed a way of instantaneously freezing all the cell of a fully developed human, could they be thawed out and live to tell the tale? Only time will tell.)