Can humans be bulletproof? The answer to that is yes.
How is this possible?
It may seem hard to believe but yes humans can be bulletproof. Scientists have bio-engineered 'bulletproof skin' by injecting a spider DNA into goats to create a bulletproof material that creates super silk that is three times stronger than Kevlar.
Kevlar
Kevlar is a synthetic fiber that is used to make bulletproof vests. It has very high tensile strengths reason why it is used for battle armor.
Spider Silk
Spider silk is used because it is said to be stronger than steel. Did it surprise you? True, spider silk is stronger than steel that if you make a steel into a string as thick as a spiders string, the spider string is ten times stronger than steel string. Isn't it amazing?
Spider silk outperforms Kevlar by 300% in its ability to absorb energy before breaking!
How it works?
Scientists grow a large amount of spider cell gene for sample tests. The spider cell gene is splice into the goat cell by cutting it.
Dutch researcher Jalila Essaidi said the 'spidersilk' project was called '2.6g 329m/s' after the weight and the velocity of a .22 calibre long rifle bullet. Working with the Forensic Genomics Consortium in the Netherlands, she said the goal was to replace the keratin in our skin with the spider’s silk.
Limitations
'In the first clip, the bio-engineered skin cushions a bullet fired at half speed. But its resistance has its limits: when shot at a full speed of 329 m/s, the bullet pierces the material and travels through it,' says New Scientist.
The process in making the silk was not easy. It was first produced in Utah, then transferred to Korea and spun into thread, then finally it was woven into layers of fabric right in Germany.
References:
http://scienceline.ucsb.edu/getkey.php?key=3239
http://www.dailymail.co.uk/sciencetech/article-2094364/Bio-engineered-bulletproof-skin-human-cells-spider-silk-revealed-video.html