Dark matter and dark energy make up 95% of all the stuff in the cosmos, but what is it? Our newest CosmoAcademy offering, starting next week, explores what we know — and don’t know — about these mysterious substances.

About 85% of all matter in the universe is dark matter, a mysterious substance unlike all the matter in our daily lives. And matter is only about one quarter of the stuff in the universe – the rest is dark energy, something even more mysterious, which has a strange accelerating effect, pushing the universe to expand faster and faster. This all sounds crazy, but there are very good reasons for believing that dark matter and dark energy are real. In this class, we’ll talk about that evidence, and our best theories about the nature of the “dark side.” We’ll also discuss ongoing and planned efforts to discover more about dark matter and dark energy.

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