I found a hornet's nest in a flower bed, and I put it along with its sole inhabitant (the hornet queen) in a plastic bag and put it in the freezer so I could inspect the inside later.
Below is the hornet queen after she spent 24 hours in my freezer. She looks pretty mean.
Below is a photo of the hornet larvae. I am not an expert on hornets, but I assume that the queen starts building the nest, laying the eggs, and gathering food all by herself until the "worker" hornets are born to help her out.