Courses from 1000+ universities
Buried in Coursera’s 300-page prospectus: two failed merger attempts, competing bidders, a rogue shareholder, and a combined market cap that shrank from $3.8 billion to $1.7 billion.
600 Free Google Certifications
Academic Writing Made Easy
Mechanics of Materials I: Fundamentals of Stress & Strain and Axial Loading
Digital Marketing
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore dark energy's nature, its potential particle form, and connections to dark matter and the Higgs boson. Delve into cosmological theories and their implications for the universe's future.
Explore how a single proton change drastically alters an element's properties, delving into electron configurations, atomic structure, and the fundamental principles of chemistry and quantum mechanics.
Explore the quantum physics behind "touching" - electromagnetic repulsion and Pauli exclusion principle explain why matter feels solid and atoms can't overlap.
Discover how spacetime, particles, and simple rules create the universe's complexity through quantum mechanics, relativity, and the Standard Model of physics.
Explore how quantum physics explains universe creation from absolute nothingness, covering inflation theory, antimatter problems, and cyclic cosmology models in 16 minutes.
Explore 7 mind-bending concepts about why the universe follows mathematical laws, from symmetries and unification to fine-tuning, multiverses, and emergent properties.
Explore five major scientific theories that seemed brilliant but were eventually proven wrong, revealing how science evolves through self-correction and refinement.
Dive into the quantum mechanics behind magnetism, exploring electron spin, virtual photons, and wavefunction interference to understand why magnets attract and repel at the fundamental level.
Explore the mind-bending AdS/CFT correspondence theory that suggests our 3D universe can be perfectly modeled by a 2D surface, revealing gravity as an emergent phenomenon.
Debunk popular science myths about lightning, brain usage, goldfish memory, and more. Discover the truth behind common misconceptions that persist despite scientific evidence.
Discover how scientific evidence systematically debunks 8 popular conspiracy theories, from moon landing denial to flat Earth beliefs, using facts and research.
Explore the fundamental question of whether physics can predict the future, examining Laplace's demon, chaos theory, quantum mechanics, and the limits of deterministic prediction.
Discover why energy conservation isn't just a rule but a fundamental consequence of time symmetry, exploring Noether's theorem and the deep connection between symmetries and physics laws.
Explore the universe's greatest unsolved puzzles: dark matter, dark energy, quantum gravity, antimatter asymmetry, cosmic inflation, black hole paradoxes, and the search for life beyond Earth.
Explore how electromagnetism, weak force, and strong force shape atoms and matter at quantum scales, revealing why gravity isn't the universe's dominant power.
Get personalized course recommendations, track subjects and courses with reminders, and more.