Introduction to Astrophysics
Everyone loves to observe the beauty of the star-studded night sky, to say nothing of…
Human Body – How We Fail, How We Heal
Your body is a fortress under constant assault. Infectious diseases, parasites, environmental toxins, physical trauma,…
How to Program, Computer Science Concepts and Python Exercises
Learning a new language opens a wealth of opportunities. But there’s one language family that…
Great Ideas of Classical Physics
There is a hidden order in the ceaselessly changing world around us. It's called classical…
Fundamentals of Sustainable Living
Become a more thoughtful consumer, save money, and reduce your ecological footprint with this course…
Understanding the Human Body: An Introduction to Anatomy and Physiology
You live with it 24 hours a day. But how well do you really know…
Medical School for Everyone – Emergency Medicine
You’re a doctor 11 hours into your shift, and you’ve just walked into a waiting…
The Skeptic’s Guide to Health, Medicine, and the Media
If you’ve ever sneezed while driving your car, did you immediately think, “Cars Cause the…
Cosmology: The History and Nature of Our Universe
Evidence for the birth of the universe is raining down on you. It's called the…
Black Holes Tides and Curved Spacetime: Understanding Gravity
The force of gravity rules the universe. It governs our everyday lives on Earth and…
Biological Anthropology: An Evolutionary Perspective
When we consider ourselves, not as static beings fixed in time but as dynamic, ever-changing…
Chemistry, 2nd Edition
Many students struggle in high school chemistry. Even if they succeed in earning a good…
Experiencing Hubble: Exploring the Milky Way
On a dark, clear night, a magnificent band of hazy light arches overhead that ancient…
Experiencing Hubble – Understanding the Greatest Images of the Universe
A few hundred miles above Earth, there is a remarkable telescope with a crystal-clear view…
Earth at the Crossroads, Understanding the Ecology of a Changing Planet
Every plant, microorganism, and animal on Earth exists within an ecosystem: a complex network of…
Do-It-Yourself: Engineering
Everyone appreciates a well-designed bridge, a sturdy skyscraper, or a flightworthy aircraft. But how many…
Dark Matter, Dark Energy: The Dark Side of the Universe
There's more to the universe than meets the eye—a lot more. In recent years, scientists…
Biochemistry and Molecular Biology: How Life Works
One of the triumphs of modern science has been our ever-improving understanding of how life…
A Visual Guide to the Universe
For the first time in human history, we can see the full splendor and mystery…
A New History of Life
Life is stranger than fiction. Recent investigations hint at episodes in the history of life…
Albert Einstein: Physicist, Philosopher, Humanitarian
In May 1905, an unknown 26-year-old Swiss patent clerk wrote to a friend about four…