Sounds gross, but it's an amazing scientific achievement. Chinese scientists have found a way to harvest cells from urine, convert them to stem cells and grow rudimentary teeth!
The teeth reportedly had dental pulp, dentin, enamel space and enamel organ. However, don't think that you'll be able to pee on a cup and get teeth out any time soon.
These teeth were not as hard as human teeth, probably because they weren't used as they were developed. They also haven't figured out how to grow specific sizes and shapes.
Learn more at the source
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Stephen Hawking thinks that it's very likely alien life exists. He thinks it's a bad idea for us to try to contact them. He thinks that aliens visiting us, as our civilization stands right now, would be similar to when Columbus arrived in America.
Fear not, however, the Center for SETI (search for extraterrestrial lab) has technology in place that let's them detect signals from up to 1000 light-years away. Given how long we've been emitting broadcasts into space, it's not very likely that we have been on someone's radar long enough for someone to pay us a visit.
One of the rats is in Brazil, and the other is in the United States. Even at this great distance, neuroscientists have been able to create a new central nervous system out of two brains. This is the first step towards building an organic computer that uses a network of linked animal brains to solve tasks.
They way they tested follow: They taught one of the rats to press a lever. Then, the other would be prompted to press the same lever. If it did, they would both get a reward. So far their success rate has been 64%. Not significant, but greater than a 50/50 chance.
Some, however, are skeptical that they haven't achieved anything beyond a 'Hollywood blockbuster' pseudo-science. Read more at the source.