In reality, electrons are confined to specific orbits, as if
they ran on rails. They cannot exist anywhere between these
orbits but have to make a “quantum leap” from one to another.
What’s more, as quantum particles, electrons exist as a
collection of probabilities rather than at specific locations,
so a better picture is to show the electrons as a set of fuzzy
shells around the nucleus. 11. Red blooded When you see blood
oozing from a cut in your finger, you might assume that it is
red because of the iron in it, rather as rust has a reddish hue.
However, the presence of the iron is a coincidence. The red
color arises because the iron is bound in a ring of atoms in
hemoglobin called porphyrin and it is the shape of this
structure that produces the color. Just how red your hemoglobin
is depends on whether there is oxygen bound to it. When there is
oxygen present, it changes the shape of the porphyrin, giving
the red blood cells a more vivid shade. 12. Going viral
Surprisingly, not all the useful DNA in your c