Full AspenCat Catalog

The creator of the popular webcomic "xkcd" uses line drawings and common words to provide simple explanations for how things work, including microwaves, bridges, tectonic plates, the solar system, the periodic table, helicopters, and other essential concepts.

Questions and answers introduce the clothing, food, language, religion, and other aspects of daily life in Ancient Rome. Questions and answers introduce the clothing, food, weapons, religion, and other aspects of daily life in Ancient Greece. Questions and answers about the desert and animals and humans who live there. Question and answer format provides scientific information on volcanic eruptions and other natural disasters. Questions and answers...