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Always read the label. About a decade ago, two scientists, Emmanuel Charpentier and Jennifer Dowdna developed a technology that would revolutionize genetics.

They created a tool that allows scientists to modify the DNA of living organisms.

It's called CRISPR, and you may have heard of it

because it caused quite a stir,

not all of it positive.

By changing the building blocks of life, were scientists playing God?

That fear came to a head in 2018, when a Chinese scientist announced he'd used CRISPR

to edit the DNA of two baby girls.

When the girls were still embryos, he used chemical scissors to turn off a gene that makes people

vulnerable to HIV infection.

His experiment shocked the scientific community and he was later sent to

prison by the Chinese government. But in general, CRISPR has been a windfall

for genetics. It's allowed scientists to carry out experiments much more quickly and it could lead to treatments for genetic illnesses long thought incurable. In recognition of that achievement, last week, Charpentier and Dowdna were awarded the Nobel Prize in chemistry.

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