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Amazingly, 95% of the make-up of the universe is stuff we can't see, according to cosmologists. Find out more about dark energy and dark matter, which far surpasses the amount of visible mass in the universe.

Definition of a Hilbert space

In this book, theoretical physicist Leonard Susskind goes into detail on the mathematics needed to study quantum mechanics.

Quantum physics uses an unusual mathematical system called bra-ket notation, which mathematically describes a wavefunction evolving over time.

The full 2014 series of Cosmos: A Spacetime Odyssey explores what science knows about our universe and some of the amazing figures that discovered it.

In the finale of Cosmos: A Spacetime Odyssey, we explore the invisible portions of our universe, filled with mysterious dark energy and dark matter.

Cosmos explains the science behind the greenhouse effect, on Earth and beyond, as well as the history of how we understood this phenomena.

The Cosmos series explores the possible origins of life on Earth and whether these origins may lie beyond the boundary of our solar system.

Brilliant physicist Stephen Hawking writes an autobiography detailing both his personal and scientific life.

Cosmos explores the earliest discoveries of the electronic age through the life and scientific work of Michael Faraday.

Dr. Tyson goes through a number of transformative phases in Earth's history, that helped lead to the development of life.

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