Model predictions of the distribution and dynamical transport of hydrogen atoms in the terrestrial atmosphere have long-standing discrepancies with ultraviolet remote sensing measurements, indicating ...

I love thinking about things I can’t see with just my eyes. Like the atoms that make up everything. I asked my friend Fred Gittes how to figure out the number of atoms in a leaf. He’s a physicist at ...

The simplest and best-studied chemical reaction - the collision of a hydrogen atom H with molecular hydrogen H2 - is still unveiling its mysteries to scientists. The simplest and best-studied chemical ...