In diagrams and illustrations of cells, DNA is sometimes shown as a mass in the cell's nucleus, like a bowl of ramen noodles. For many years, it's been standard practice to take images of cells that ...

This image depicts the radium atom’s pear-shaped nucleus of protons and neutrons in the center, surrounded by a cloud of electrons (yellow), and an electron (yellow ball with arrow) that has a ...

Every time a eukaryotic cell divides, it faces a monumental challenge: It must carefully duplicate and divide its genetic material (chromosomes) equally, and then rebuild the nuclear envelope around ...