In human cells, there are about 20,000 genes on a two-meter DNA strand—finely coiled up in a nucleus about 10 micrometers in diameter. By comparison, this corresponds to a 40-kilometer thread packed ...

The Human Genome Project was a massive undertaking that took more than a decade and billions of dollars to complete. For it, scientists collected DNA samples from anonymous volunteers who were told ...

Here’s what you’ll learn when you read this story: Scientists are trying to sequence the DNA of Leonardo da Vinci to identify if the remains at his interment site really are his. The project began ...