And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all ...

753,730 views

Hank teaches us why water is one of the most fascinating and important substances in the universe. Follow SciShow on Twitter: http://www.twitter.com/scishow Like SciShow on Facebook: http://www.facebook.com/scishow Review: Re-watch = 00:00 Intro...

by | 356,222 views

Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat. Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse ...

308,321 views

Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies. Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/s...

264,075 views

Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane. Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitt...

215,902 views

Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse ...

172,052 views

In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCo...

268,581 views

Hank explains the extremely complex series of reactions whereby plants feed themselves on sunlight, carbon dioxide and water, and also create some by products we're pretty fond of as well. Like CrashCourse on Facebook: http://www.facebook.com/Y...

238,345 views

Hank and his brother John discuss heredity via the gross example of relative ear wax moistness. Like CrashCourse on Facebook! http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter! http://www.twitter.com/TheCrashCourse This v...

171,670 views

Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter...

244,845 views

Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins. Lik...

199,172 views

Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies. Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitt...

177,712 views

Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms. Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on ...

167,272 views

Hank guides us through the process of natural selection, the key mechanism of evolution. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/theCrashCourse Table of Conte...

157,612 views

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs. Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: htt...

132,949 views

Hank discusses the process by which organisms grow and develop, maintaining that, in the end, we're all just tubes. Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitter.com/the...

105,756 views

Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship, and to discover how those processes evolved. Also fr...

119,555 views

Hank talks about population genetics, which helps to explain the evolution of populations over time by combing the principles of Mendel and Darwin, and by means of the Hardy-Weinberg equation. Like CrashCourse on Facebook: http://www.facebook.com...

111,445 views

Hank tells us the background story and explains the importance of the science of classifying living things, also known as taxonomy. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www...

107,976 views

Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization. Like CrashCourse on Faceboo...

191,550 views

Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. Like Crash Course on Facebook: http://www.facebook.com/YouTub...

by | 92,047 views

Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, oct...

94,853 views

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http:/...

57,527 views

Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal sarcopterygian...

79,453 views

Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do. Like Crash Course on Facebook: http://www.facebook.com/youtubecrashcourse Follow Crash Course on Twitter: http://www.twitter.com...

79,356 views

Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitte...

148,906 views

Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function. Like CrashCourse? http://www.facebook.c...

107,645 views

Hank takes us through the bowels of the human digestive system and explains why it's all about surface area. Like Crash Course? http://www.facebook.com/youtubecrashcourse Follow Crash Course: http://www.twitter.com/TheCrashCourse Table of Conten...

129,667 views

Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCour...

97,104 views

Hank introduces us to the framework of our bodies, our skeleton, which apart from being the support and protection for all our fleshy parts, is involved in many other vital processes that help our bodies to function properly. Like CrashCourse: h...

137,874 views

Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax. Like CrashCourse: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse: http://www.twitter.com/TheCrashCourse Table of Con...

94,773 views

Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system. Like CrashCourse - http://www.facebook.com/YouTubeCrashCourse Follow ...

141,541 views

Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development & function. Like CrashCourse on ...

105,706 views

Hank lets us in on the meaning of life, at least from a biological perspective - it's reproduction, which answers the essential question of all organisms: how do I make more of myself? So, sex, how does it work? Like CrashCourse: http://www.face...

109,405 views

Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most abundant org...

71,839 views

Hank introduces us to nonvascular plants - liverworts, hornworts & mosses - which have bizarre features, kooky habits, and strange sex lives. Nonvascular plants inherited their reproductive cycle from algae, but have perfected it to the point wher...

69,777 views

Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and the their secret is also their defining trait: conductive tissues that can take food and...

68,828 views

Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a whole lot differently compared t...

59,612 views

Death is what fungi are all about. By feasting on the deceased remains of almost all organisms on the planet, converting the organic matter back into soil from which new life will spring, they perform perhaps the most vital function in the global ...

77,560 views

Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been interacting...

87,559 views