TED-Ed
What causes bad breath? - Mel Rosenberg
Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath and what you can do when it strikes you.
SciShow
Antibiotics In Your Nose!
We have plenty of exciting news on holes in the earth and holes in your face! One of them broke records and the other keeps you healthy.
Be Smart
Life by the Numbers
How successful are we compared to other species? It turns out that biomass, or what things weigh, can be more important than how many of something there are. Find out how our numbers stack up against everything from bugs to bacteria, and...
TED Talks
Tal Danino: Programming bacteria to detect cancer (and maybe treat it)
Liver cancer is one of the most difficult cancers to detect, but synthetic biologist Tal Danino had a left-field thought: What if we could create a probiotic, edible bacteria that was "programmed" to find liver tumors? His insight...
SciShow
Why Are There Bacteria In My Yogurt?
Having bacteria in your food doesn't really sound great, but you couldn't have yogurt without it! Learn why in this week's QQ!
SciShow
Metal vs. Bacteria
Even before we knew what bacteria were capable of, we were using certain metals to help fight off their effects.. Hank Green explains how on this episode of SciShow.
Be Smart
We're Mainly Microbe: Meet Your Microbiome
Ever not felt completely like yourself? There's a good reason for that. Because a large part of you isn't actually you. Our bodies are home to ten times as many microbes as human cells. We are walking ecosystems, each of us home to...
TED-Ed
TED-Ed: The beneficial bacteria that make delicious food - Erez Garty
Where does bread get its fluffiness? Swiss cheese its holes? And what makes vinegar so sour? These foods may taste completely different, but all of these phenomena come from microorganisms chowing down on sugar and belching up some...
SciShow
How to Get Drunk on Bread
A man walks in to a hospital super drunk... but claims he hasn't had a sip of alcohol. Join us today for SciShow medical mystery!
TED-Ed
TED-Ed: Are spotty fruits and vegetables safe to eat? - Elizabeth Brauer
In 2010, 30 billion dollars worth of fruits and vegetables were wasted by American retailers and shoppers, in part because of cosmetic problems and perceived spoilage. But what are these spots, anyway, and are they okay to eat? Elizabeth...
Be Smart
Which Life Form REALLY Dominates Earth?
Are humans really Earth's most dominant species? Let's put all of the planet's living things on a scale and see what has amassed the most mass. This week we break down the concept of "biomass" to judge Earth's living things from top to...
Crash Course
How Do Outbreaks Start? Pathogens and Immunology - Crash Course Outbreak Science
You may not realize it, but your body is like a fortress, designed to defend you from tiny foreign invaders known as pathogens. This seemingly small world is actually super diverse, and sometimes super dangerous too. That’s why in this...
SciShow
What Happens If You Don't Take out a Splinter?
Splinters are gross, but you might want to watch this before grabbing the tweezers.
SciShow
How Often Do You Really Need to Shower?
Do you really need a daily shower to stay clean, or is it doing more harm than good? Some scientists have recommendations based on what we know about our skin , and what might be living on top of it.
Bozeman Science
Endosymbiosis
Paul Andersen explains how eukaryotic cells were formed through a process of endosymbiosis. He describes how aerobic bacteria became mitochondria and cyanobacteria became chloroplasts. He mentions an example of symbiosis that occurs...
TED-Ed
TED-Ed: The wacky history of cell theory - Lauren Royal-Woods
Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the foundations of biology.
Crash Course
Old & Odd: Archaea, Bacteria & Protists - CrashCourse Biology
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...
TED-Ed
TED-Ed: Does stress cause pimples? - Claudia Aguirre
Which came first: the stress or the pimples? The physical reactions to stress can cause major breakouts, which, in turn, can be even more stressful! Claudia Aguirre gives just one more reason to get that stress under control.
Bozeman Science
r and K selection
Paul Andersen explains the differences between an r and a K selected species. He starts with a brief description of population growth noting the importance of; r or growth rate, N or number of individuals in the population, and K the...
TED-Ed
TED-ED: What causes body odor? - Mel Rosenberg
Most of us don't need more than one whiff to identify that generally unpleasant, characteristic smell we call body odor. But it's a surprisingly complex phenomenon, influenced by our genetic makeup, age, diet, and hygiene. So what is...
Crash Course Kids
Home Sweet Habitat: Crash Course Kids
How would a Polar Bear do if you put it in the desert? Not well. But why? Why can't anything live anywhere? Well, this has to do with Habitats and how animals (including humans) are suited for living in one place over another. In this...
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.