7x1 - The Complicated Sex Lives of Hydra

May 29, 2023

If we were to write a fable to get this moral across, it would have to star the freshwater cnidarian called the hydra. Because in the hydra, the question of butts connects to the ambiguities of immortality, which in turn relates to the befuddling matter of sexual reproduction.

7x2 - When Is A Fungus Not A Fungus?

June 5, 2023

Oomycetes are one of the more unusual-looking microbes we’ve seen in the microcosmos. It looks more like a coral reef painted by an artist inspired by Gustav Klimt and a pile of trash. And if you saw that painting hanging in the museum, you might pass it by without thinking much of its subject.

7x3 - The Cryptic Origins of Yogurt

June 12, 2023

The microcosmos is home to many unusual partnerships. Life is, after all, just relationships, each of which build upon one another like strokes of paint in an epic tableau of ecology, epidemics, and yogurt?

7x4 - Why Beggiatoa Are Stuffed Full Of Sulfur

June 19, 2023

There’s a few things that give Beggiatoa away. The first is the simple serpentine shape of their bodies, and the second are those little dots inside of them. They look like bubbles, but they’re actually sulfur granules.

7x5 - We Don't Know Why Moth Wings Glow

July 10, 2023

A little while ago, James found himself with a bit of a problem. He was keeping some wheat grains at home to use as food for the microbes that he cultures and films for our enjoyment. But before he could feed the grains to his microbes, they became infested with the larvae.. of moths.

7x6 - Avoid These Tiny Bits of Killer Fluff (If You Can)

July 17, 2023

When you hear the phrase “brain-eating amoebas,” is there a particular image that comes to mind? Whatever you envision, it's probably not what the notorious brain-eating amoeba that strikes fear in our hearts actually looks like.

7x7 - This Neon World Is Inside Your Fruit

July 24, 2023

Usually we’re looking into pond water or whatever other fascinating bit of nature that James, our master of microscopes, usually looks at. But right now, our sights are coming to us directly from the kitchen and from a different master of microscopes.

7x8 - Up Close With The World's Deadliest Animal

July 31, 2023

Under the microscope, mosquitos undergo a metamorphosis sculpted in gold. The buzzing body takes on a life of its own, its usual role as menace lying far beyond the margins of the screen.

7x9 - Falling In Love With Microscopy

August 7, 2023

This video is all about James, who many of you know as our master of microscopes. He is the scientist, and the artist, behind just about everything we are able to see in our collective journey through the microcosmos.

7x10 - The Tiny Worlds Inside of Puddles

August 14, 2023

When was the last time you saw a puddle? Was it recent—perhaps some time in the past week, fresh from a downpour? Or has it been a long time since you’ve seen rain, and so an even longer time since your path has crossed a puddle?

7x11 - Why Are Some Birds Blue?

August 21, 2023

One of the spectacular details of animals in our world is just how varied their colors can be. When you look at birds, for example, you’ll see everything from mundane grays to iridescent blues. So why don’t we shine with the same iridescence of birds?

7x12 - The Electric Relationship Between Plants And Bees

August 28, 2023

When you think of bees, you probably don’t think of single-celled eukaryotes. What could an insect have in common with, say, a ciliate?

7x13 - Floating Cities of Scum

September 4, 2023

When you think of bees, you probably don’t think of single-celled eukaryotes. What could an insect have in common with, say, a ciliate?

7x14 - Liverworts Use The Rain To Make Their Clones

September 11, 2023

An ambiguously long time ago, there was this theory of medicine. An idea that if you came across a plant that looked like a body part, that meant it was meant to treat ailments that targeted said part. And this put a lot of pressure on liverwort, simply because it resembled the liver.

7x15 - Bacteria That Survive In Gelatinous Colonies

September 18, 2023

In the 1820s, a man named Dr. R. Brandes walked through a meadow on a quest to try and answer a centuries-old question about a mysterious gelatinous substance on the ground known as “star jelly.”

7x16 - Is It Possible To Photosynthesize In The Dark?

September 25, 2023

Our master of microscopes is always looking for rare ciliates that live in areas low in oxygen. But when he puts those samples under a growth light, his tubes quickly turn the color of the green sulfur bacteria that thrive in those anaerobic conditions.

7x17 - This Predator Is A Shape-Shifter

October 2, 2023

In the middle of the 19th century, a scientist stared into the microscope and found, staring back at him, a vampire.

7x18 - Blood-Sucking Escape Artists

October 9, 2023

Of all the animals that we’ve examined in the microcosmos, leeches are probably one of the few that can be used as a verb, to leech off someone—to take and take from them, like a worm consuming someone’s blood.

7x19 - This Microscopic Killer Wears Its Victims

October 16, 2023

If you have been following Journey to the Microcosmos for some time, this might sound like a familiar story.| Consider this a proper slasher movie sequel.

7x20 - These Dancing Worms Are Surprisingly Useful

October 23, 2023

7x21 - Some Ciliates Are Hiding a Secret Weapon

October 30, 2023

7x22 - Can Microbes Just Appear Out Of Nowhere?

November 6, 2023

Can life be created spontaneously? Well, a year and a half ago, our master of microscopes, James, was inspired by the idea of spontaneous generation and set up his own little experiment.

7x23 - Trying To Solve Some Micro Mysteries

November 13, 2023

We Found Some Things We Can't Explain Today's episode has one particular theme: a bunch of funny things going on in the microcosmos.

7x24 - What Do These Algae Do With Four Genomes?

November 20, 2023

7x25 - The History of Red Algae

December 11, 2023

Imagine that you aren’t watching the microcosmos right now. Instead you’re living in the world as it existed around one billion years ago, and you are the ancestor of this red algae.

7x26 - These Mites Give Cheese Its Flavor

December 18, 2023

7x27 - Why Picocyanobacteria Might Just Outlast All Of Us

January 9, 2024

In the northeast Atlantic Ocean, plankton populations aren’t looking like they used to. And at the center of it all are tiny, photosynthetic bacteria called picocyanobacteria who may just outlast us all.

7x28 - We Built A Tardigrade Trap, And It Worked

January 15, 2024

We don’t know if there are many rites of passage institutionalized among amateur microscopists. But we have to imagine that, as people find themselves navigating the microcosmos for the first time, they’re often on the lookout for tardigrades.

7x30 - This Microbe Hasn't Been Seen Since The 1930s

January 29, 2024

After an absence of almost 90 years, we’ve found a rare ciliate last written about about in 1933.

7x31 - What Makes A Microbe Rare?

February 12, 2024

In the microcosmos—where the organisms vastly outnumber us, where what we find in a single pool of water can change from day to day—it makes us as what it mean for a microbe to be rare?

7x32 - These Tiny Crustaceans Hate Change

February 19, 2024

One of the fascinating aspects of microscopy is the way you can look so deeply into something that it becomes unrecognizable. What could look like a stained glass window could actually turn out to be... a hopping shrimp?

7x33 - This special diatom is having a very bad day

February 28, 2024

It’s hard to count how many times we’ve encountered diatoms on Journey to the Microcosmos. However, we've always talked about the more colorful variety of diatom, and not the ones that are colorless.

7x34 - We Fed Our Microbes Blood So You Don't Have To

March 4, 2024

If you’ve clicked on this video, we assume it’s because you read the title, “We fed our microbes blood so you don’t have to,” and immediately asked the question everyone asks when a youtuber says they did something so you don’t have to: but why?

7x35 - These Slugs Led Us to the Last Good Place on the Internet

March 11, 2024

If you were asked to describe what a sea slug is, you might be tempted to go with the straightforward response: it’s a slug that lives in the sea. And you know, you wouldn’t be wrong.

7x36 - How Do We Find Cancer?

March 25, 2024

Usually on Journey to the Microcosmos, we spend our time delving into the microscopic world and the surprising things that microbes have to teach us. But today, we would like to talk about Hank Green, and what was his cancer.

7x37 - Watch a Stentor Fix Itself

April 15, 2024

Today James, our master of microscopes, is using a microscopy slide as a cutting board, chopping away at the slide to end up with a bunch of individual stentors.

7x38 - This Amoeba Made Armor From Its Dead Enemies

April 22, 2024

This amoeba has a shell around it, which seems like a pretty good idea. The world at large is full of predators, and shells seem like a straightforward strategy to ward those predators off. But what if this amoeba’s shell wasn’t just a form of protection? What if it was actually dangerous?

7x39 - We Found Something Strange in Portugal

April 29, 2024

Sometimes, the microcosmos can take a little while to surprise. You have to be patient, enjoying the familiar sights as you wait for something new.

7x40 - We've Been Looking For This Purple Amoeba for 6 Years!

May 6, 2024

We know that it’s bad form to return to the same word over and over again here on Journey to the Microcosmos. But whenever we write about amoeba, we will probably say the word “blob” a lot.

7x41 - You Have Something in Common With This Horrifying Tube Worm

May 13, 2024

When James, our master of microscopes, was looking through samples he’d received from Spain, he didn’t expect to see this—a creature straight out of a horror movie, with dark reddish brown eyes and tentacles streaming out of its mouth.

7x42 - Tiny Mysteries from the Black Sea

May 28, 2024

When you think of mussels and clams and other bivalve animals, you might think of something as shelled and static, perhaps sitting on your plate at a fancy restaurant. But before the mussel got to your plate, it led a life—and all things considered, a surprisingly active one.

7x43 - We Found a Very, Very Tiny Kraken

June 10, 2024

Our Master of Microscopes James was fascinated by something he found in some samples he had been given from Portugal. Something that would lead us to a kraken in the microcosmos…but how?

7x44 - How Does The Microcosmos Change With the Seasons?

June 24, 2024

We Spent a Year Looking at Microbes in a Polish Pond Have you ever wondered what seasons look like to a microbe? How they navigate the highs, the lows, and all the muddy, slushy in-betweens?