Each of us has enough DNA to reach from here to the sun and back, more than 300 times. How is all of that DNA packaged so tightly into chromosomes and squeezed into a tiny nucleus? Histones are a ...

What do a human, a rose, and a bacterium have in common? Each of these things — along with every other organism on Earth — contains the molecular instructions for life, called deoxyribonucleic ...

There are four types of base - adenine, thymine, cytosine and guanine. All human cells contain DNA. The 3 billion pairs of bases in each cell fit into a space that is six microns across.

A single strand of DNA forms a chromosome, like the one displayed to the left. This chromosome is magnified (1000x). That's not nearly enough to show a single strand of DNA, which is only wide ...

Because of its 46,000 years of unbroken DNA information, archeologists can peer back into a time when Homo neanderthalensis occupied the area all the way up to modern Homo sapiens in the Upper ...