Hydrogen bonds are the things that make sure mildly important stuff like water and DNA behave themselves. The above picture (it's actually a high-resolution atomic force microscopy image) shows some hydrogen atoms (in white) bonded with oxygen atoms (in red) as part of a molecule of 8-hydroxyquinoline. It's not like it's a surprise that these bonds exist, but there's a big difference between saying "our models predict that there should be a bond there" and saying "oh hey, look at that, there's a bond there!"
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