Scientists in China say they have successfully grown a human tooth using stem cells taken from urine.
Researchers say the technique could one day be used as a way to replace teeth lost through aging and poor dental hygiene, with the added bonus that urine is deemed a less controversial source of stem cells than human embryos.
ONCE you know what it is, this apparently innocuous picture of a blob assumes a terrible gravity. It is an adult human brain that is entirely smooth – free of the ridges and folds so characteristic of our species' most complex organ.
We can only imagine what life was like for this person. He or she was a resident of what is now North Texas State Hospital, a mental health facility, and died there in 1970, but that's all we know. While the jar containing the brain is labelled with a reference number, the microfilm containing the patient's medical records has been lost.
...researchers from the historically Transylvanian city of Romania, called Cluj-Napoca, announced the first-ever artificial blood that could be used without fearing life-threatening side effects of prior models.
The new artificial blood relies not on hemoglobin, like typical artificial bloods, but hemerythrin — a protein extracted from sea worms that is then mixed with water and salts.