Explore
310 courses, six subjects, 30 languages.
The introduction of every course is free to read here. The rest is in the app.
History65 courses
Science57 courses
Literature47 courses
Art45 courses
Mythology46 courses
Understanding the world50 courses
Science · 6 minWhy do we yawn?Body & brain
Science · 7 minHow does memory work?The brain
Science · 6 minWhy do we get chills?Body & emotions
Science · 6 minHow does soap kill viruses?Hygiene
Science · 7 minThe discovery of penicillinFleming, 1928
Science · 6 minHow was electricity discovered?From Franklin to Tesla
Science · 6 minHow were X-rays discovered?Röntgen, 1895
Science · 5 minThe discovery of the microwave ovenBy accident
Science · 7 minThe theory of gravitationNewton, 1687
Science · 6 minThe discovery of radioactivityMarie Curie
Science · 8 minHow was the Internet born out of the Cold War?From ARPANET to the Web · Myra Houser
Science · 5 minThe structure of DNA1953
Science · 8 minThe discovery of anesthesiaMedicine
Science · 6 minDarwin's theory of evolution1859
Science · 9 minWhat is the Big Bang?13.8 billion years
Science · 7 minWhy do volcanoes erupt?Magma & plates
Science · 9 minHow do earthquakes happen?Faults & waves
Science · 8 minWhat happened at Chernobyl on 26 April 1986?April 26, 1986
Science · 7 minWhy doesn't the Moon fall to Earth?Orbit & gravity
Science · 10 minAre we alone in the Universe?Exobiology
Science · 8 minWhat is a black hole?Extreme gravity
Science · 8 minThe theory of relativity for everyoneEinstein 1905 & 1915
Science · 7 minHow does lightning form?Thunderstorms
Science · 7 minWhat is the greenhouse effect (really)?Climate & atmosphereThe rest of every course is in the app.The quiz, the glossary and the 30 languages. Free to start.