PBS
Why Only Earth Has Fire
New ReviewTo get fire, which exists only on Earth, it took billions of years of photosynthesis – which means fire can’t exist without life. And fire and life have been shaping each other ever since.
SciShow
9 Scientific Cooking Techniques
All cooking is science: we use chemistry and physics to steam, fry, bake, or microwave almost all of our meals. However, there are some cooking methods that delve into even deeper and stranger scientific territory.
SciShow
Why Do Old Books Smell So Good?
Musty, with hints of vanilla, coffee, and maybe fresh cut grass-- why do old books smell the best?
SciShow
Where Did Last Year's Banana Trees Go?
Everyone loves bananas. But because banana trees die and grow back every year, researchers want to find ways to recycle all that biomass -- from bioplastic, to solar panels, to skateboards.
SciShow
How the Manhattan Project Gave Us Today's Air Filters
HEPA filters are the basis of modern filtration - but they also represent a straight line from the Manhattan Project to your living room!
SciShow
4 Animals That Don’t Have Resident Gut Microbiomes
We humans couldn’t live without our gut microbes, but not all animals rely on microscopic digestive communities like we do. And understanding why these animals ditched their microbial partners can teach us a lot about the costs and...
Amoeba Sisters
Classification
Explores classification in biology as well as taxonomy hierarchy: domain, kingdom, phylum, class, order, family, genus, and species with The Amoeba Sisters! This video also discusses the importance of scientific names and why...
MinuteEarth
Why Don't More Animals Eat Wood?
Wood is abundant and full of energy, but outside of some insects, almost no animals eat it because the stuff it's made of is hard to break down
SciShow
The Science of the Cinnamon Challenge
Hank explains the science behind the "cinnamon challenge," and reveals why it is nearly impossible to complete.Do not attempt the cinnamon challenge! Instead, why not just watch some videos of the thousands of YouTubers failing at it!...
Crash Course
Biological Molecules - You Are What You Eat: Crash Course Biology
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.
SciShow
6 of the Biggest Single-Celled Organisms
When you picture a single cell, you probably imagine something super tiny that you had to look at through a microscope. But, there are some huge exceptions to this rule. And we really do mean huge. Chapters Stentor coeruleus 1:27 Gromia...
TED-Ed
TED-Ed: Biofuels and bioprospecting for beginners - Craig A. Kohn
Biofuels can provide energy without the reliance on environmentally harmful fossils fuels -- but scientists are still searching for a plentiful source. Craig A. Kohn demonstrates how cellulose, the naturally abundant tough walls of plant...
SciShow
Why Can't You Digest Grass?
You've probably seen cows enjoying a nice mouthful of grass, but why can't we do the same?
Crash Course
Photosynthesis: Crash Course Biology
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.
Bozeman Science
Plants
Paul surveys the Kingdom Plantae. He begins with a brief description of the phylogeny of land plants. He then describes the defining characteristics of plants, including cell walls, embryophytes, alternation of generation and...
SciShow
Why Do Dogs Eat Grass?
Why do dogs eat grass? A look at your pup’s wild relatives may give you a sense of what dogs’ diets are really like.
TED-Ed
TED-Ed: The simple story of photosynthesis and food - Amanda Ooten
Photosynthesis is an essential part of the exchange between humans and plants. Amanda Ooten walks us through the process of photosynthesis, also discussing the relationship between photosynthesis and carbohydrates, starch, and fiber --...
Bozeman Science
Carbohydrates
Paul Andersen begins by explaining the structure and purpose of carbohydrates. He describes and gives examples of monosaccharides, disaccharides, oligosaccharide and polysaccharides. He explains how they grow through dehydration...
TED-Ed
TED-Ed: The science of macaroni salad: What's in a molecule? - Josh Kurz
What do macaroni salad and gasoline have in common? They are made of exactly the same stuff -- specifically, the same atoms, just rearranged. So, while we put the former in our mouths and the latter in our cars, they are really just...
Bozeman Science
Polymers
Paul Andersen explains how polymers are formed from monomers. He describes how carbohydrates, protein and nucleic acids are created through condensation reactions. He also explains how these macromolecules are broken down through the...
Crash Course
The Sex Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology
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...
Crash Course
Plant Cells: Crash Course Biology
Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells.
Professor Dave Explains
Invertebrate Chordates Part 2: Subphylum Tunicata (Tunicates)
Continuing with the invertebrate chordates, we arrive at subphylum Tunicata, also known as the tunicates. There are over 3,000 species within this clade, and the creatures are fascinating. The body of a tunicate is enclosed in a thick...
Curated Video
Polysaccharides: the large carbohydrates you want to meet
Polysaccharides are large carbohydrates that have different structures and functions in humans and other living organisms. Starch, cellulose and glycogen are the 3 main types of polysaccharides we usually talk about when we learn about...