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22-08 1208 1min27 2194 1min14 3291 1min54 Scientiststried to find ways to reprogram cells for years. They tend to use as less aspossible genes to reduce the chance of cancer. They were kind of stuck by usingOct4 until a Chinese team took an indirect approach. There were some barriers.But now, the new way to reprogram has reached some significant achievements. Wejust need to wait more proof that the technique is safe for human. 4 3922min35 5365 2min09 Thestructure of mammal gene- one X doesn’t show the function. Compare genesbetween human beings and mice-we share majority of the gene-most of the unsharedgene is contained in X-X changed from time to time and create the evolution-unsharedX gene are active in testis to create new life. Obstacle864 5min13 Scientistsdiscovered a new study about the natural leadership shift among a flock ofanimal. -whybirds fly in group and how do they change direction and who is the leader -usingcomputerized GPS, camera and system make it possible to track the motion ofeach one in the group -trackthe leader on the ground and in the air, combine the results together for thefirst time -howdo they change direction and the leader on the ground is not in charge of thegroup -howdo they choose leader is still not clear and need more research | 
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发表于 2013-7-24 03:01:50
