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. References:...

In which John Green teaches you about the beginning of the so-called Age of Discovery. You ve probably heard of Christopher Columbus, who "discovered" America in 1492, but what about Vasco...

In which John Green teaches you about the European Renaissance. European learning changed the world in the 15th and 16th centuries, but was it a cultural revolution, or an evolution? We d argue...

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...

In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange"...

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. References: http://www.sciencedaily.com/releases/2010/07/100...

Join real estate agent Joshua Wesoky on a tour of 12 Greene Street, a SoHo penthouse that feels more like a townhouse. This stunning apartment features an unbelievable amount of outdoor space...

This Old House contributor Mark Clement shares a few tricks and tips on how to utilize the shoe of the saw to its utmost potential. The shoe is often adjustable, which allows greater access...

This Old House general contractor Tom Silva installs a cable railing on a deck in Greenwich Village, New York. (See below for a shopping list, tools, and steps.) SUBSCRIBE to This Old House:...

Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do. References: http://webspace.ship.edu/cgboer/actionpot.html http://brainconnec...

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:...

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. References: http://webspace.ship.edu/cgboer/actionp...

Hank takes us through the bowels of the human digestive system and explains why it s all about surface area. Table of Contents 1) Surface Area to the Max! 3:21 2) Mouth to Esophagus 5:23 3)...

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...

Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax. Table of Contents 1) Cardiac, Smooth, & Skeletal Muscles 01:09 2) Muscle Anatomy...

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. Table of Contents...

In which John Green teaches you about capitalism and socialism in a way that is sure to please commenters from both sides of the debate. Learn how capitalism arose from the industrial revolution,...

Hank fills us in on the endocrine system - the system of glands that produce and secrete different types of hormones directly into the bloodstream to regulate the body s growth, metabolism,...

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,...

Hank introduces us to nonvascular plants - liverworts, hornworts & mosses - which have bizarre features, kooky habits, and strange sex lives. Nonvascular plants inherited their reproductive...