Buzz
As a huge fan of nature trivia, it's always disappointing to see the same 50 facts recycled all over the internet like a never-ending playlist of animal kingdom clichés. Cheetahs are fast, hyenas are vicious, and everything in Australia is out to kill you. We’ve heard it all. So, here are 10 unusual facts about nature that I bet you haven’t come across yet.
10. Insects Possess Alien-Like Blood
It’s not technically blood, but a substance called hemolymph. Considering humans and insects last shared a common ancestor over 500 million years ago, it makes sense that some differences exist. Hemolymph is copper-based instead of iron, which gives it a bluish or greenish hue when it’s oxygenated.
Insects don’t use their circulatory system to transport oxygen. Instead, they rely on respiration through their skin, which provides all the oxygen they need. This means their circulatory system is much more relaxed compared to ours. In fact, their hearts beat at a slower rate than ours and can even enter a resting state to save energy.
The Weta, a New Zealand insect, has gained attention recently due to a unique protein in its hemolymph that prevents the formation of ice crystals. This trait is not so rare, though—many beetles, flies, and bees have a similar ability.
9. Moles Have Surprisingly Soft Fur
If you’ve ever annoyed a cat by petting it the wrong way, you’ll know how sensitive animals can be about the direction of fur. However, a mole wouldn’t mind being stroked from tail to head. Each hair on a mole's body is anchored in a fluid-filled sac, allowing them to lie flat in any direction without causing discomfort or resistance.
This adaptation is incredibly practical. Living in tunnels that are barely larger than your body means that sometimes you have to move in reverse. It’s much easier to do this when your fur is always aligned to smoothly accommodate any directional change.
The extraordinary softness of mole fur has caught attention for centuries, and I’ve heard that it makes exquisite coats. Combined with their status as pests in human society, many mole species are now at risk of extinction.
8. Birds Would Not Survive in Space
Over the years, I’ve seen various websites speculate that birds could thrive in a zero-gravity environment. One even suggested that the only reason they haven't been sent to space is due to hygiene concerns. I can assure you, that's far from the truth—except for the hygiene part, because... well, ew.
The main reason birds can’t survive in space is that most of them, including the swallow, cannot swallow without gravity. While birds are capable of regurgitating food, they rely on gravity to get food and water down in the first place. That’s why they dip their beaks in water and then lift their heads to let it trickle down. If birds were sent to the ISS, they would likely die from dehydration, or even drown in the process of trying to drink.
As a fun fact, pigeons have actually been sent aboard the ‘Vomit Comet’—a plane that flies in long parabolic arcs to simulate zero gravity for brief moments. They didn’t fare too well with flying in weightlessness either.
7. Moths Have an Anti-Bat Defense System
Bats are some of the most well-documented predators in the animal world, so being a flying insect active at night might seem like a death sentence. But it turns out, moths are caught up in a 50-million-year-old arms race with bats. The major flaw with echolocation is that it lets the target know you're coming, much like every submarine movie you’ve seen.
Many moth species have developed ways to use this to their advantage. Some can even estimate the distance to their predator and react with increasing urgency as it gets closer. My favorite defense strategy is called 'flight cessation,' which is essentially just falling out of the air.
Tiger moths take things a step further by deploying countermeasures. Just as the bat is about to strike, they release a series of clicks that disrupt the bat’s sonar, causing it to miss as much as 80% of the time in recent studies.
6. The Axolotl Never Fully Matures
The axolotl is a salamander-like creature that grows to about a foot in length. It’s fully aquatic, herbivorous, and has a lifespan ranging from 10 to 15 years. While its relative, the tiger salamander, looks similar during its early stages, the axolotl never undergoes metamorphosis into an adult salamander.
What’s truly fascinating is that the axolotl can actually undergo this transformation. By using iodine to stimulate its thyroid—a process it normally lacks the hormones for—the axolotl can be induced to go through a metamorphosis that its species left behind long ago.
Sadly, the axolotl’s only natural home is the waters around Mexico City. Pollution, invasive fish species, and their reputation as a delicacy have all led to a sharp decline in their population. In fact, more axolotls live in home aquariums today than in the wild. Although I find them adorable, they still frequently appear on lists of 'the ugliest creatures ever' on the internet.
5. Owls Aren’t Actually Very Intelligent
It’s tough to look into the face of an owl and not assume it knows something you don’t. In reality, what it’s best at is hunting and consuming rodents with impressive efficiency. While its eyes are huge, its skull is not, which leaves minimal space for a brain. Although it processes vast amounts of visual information, it doesn’t have the capacity for much critical thought.
Training owls to perform even the simplest tasks is incredibly challenging. When Gary Gero, the owl trainer who worked on the Harry Potter films, was asked about the origin of the phrase 'wise old owl,' he responded with, 'I don’t know who coined the phrase, but I can tell you it wasn’t an owl trainer.'
4. Taxifolia Is Spreading Everywhere
Back when I was a kid, every saltwater fish tank seemed to have Caulerpa taxifolia. This resilient and colorful species of seaweed produces a toxin that makes it inedible to almost all marine life. This is ideal for certain species of tank fish that like to destroy your live decorations. But what happens when a fast-growing, poisonous plant invades an ecosystem where it doesn’t belong? It’s dubbed 'The Killer Algae' and quickly finds its way onto the IUCN’s list of the world’s most invasive species.
The debate on how Caulerpa taxifolia made its way into the Mediterranean Sea is as contentious as the debate over its impact. However, by the early 90s, it had spread to cover an estimated 30 square kilometers in just a decade. While some studies suggest its introduction may have some positive effects, the undeniable fact remains: many native species just can’t coexist with it.
The unfortunate reality is that the invasion was spotted early on. However, the ensuing blame game prevented any real action, and now it may be too late to do anything but observe the consequences unfold.
3. Siphonophores Will Completely Blow Your Mind
Siphonophores raise some truly profound philosophical questions about what defines an individual organism. But first, let me explain what they are. The most famous example is the Portuguese man o' war, often mistakenly identified as a jellyfish. Other notable siphonophores include the praya dubia, which ranks among the longest creatures known to science at a staggering 50-60 meters, and a newly discovered species from the Erenna genus that produces an incredibly rare red bioluminescence.
A siphonophore is a colony of zooids, each of which is a distinct organism with a specific function. These zooids can perform their roles independently, benefiting the colony as a whole. However, they rely on other types of zooids to fulfill tasks they cannot do themselves. This does not necessarily make them individual organisms. Despite the many elements that separate them within the colony, the entire siphonophore grows from a single egg.
So, are they one organism or many? This is where things get tricky. From a distance, it certainly appears and behaves like a single creature, but the closer you get, the more distinct its parts become. Hovering between being a colony and a complex multicellular organism, the siphonophore might hold significant insights into how evolution might have bridged that gap. To me, that’s absolutely fascinating.
2. Jumping Spiders Have Remarkable Depth Perception
Having eight eyes doesn’t automatically mean something has great vision. Field of vision isn’t the same as acuity. For most spiders, this isn't an issue since they trap their prey and wait, but that’s not the case for the more mobile hunters like jumping spiders.
It’s only in recent years that scientists have started to unravel how the jumping spider’s eyes function. The two main eyes are incredibly intricate. Even though the lenses stay fixed, they can achieve some form of binocular vision by shifting the retina behind them. These retinas consist of multiple layers of light-sensitive cells.
When an image is in focus on one layer, it’s blurry on the one just above it. By comparing the sharp image with the blurry one, the spider can accurately judge distance. This process is so precise that a Japanese company is working on adapting it to create a camera that could potentially film in 3D with just one lens.
1. Hoatzin Chicks Have Hands
Now let’s talk about a creature that’s doing just fine. The hoatzin is an oddly beautiful bird that tastes awful and smells even worse—traits that are quite effective at keeping humans away. Some birds hatch with spurs or claws on their wings, but in hoatzin chicks, these actually serve a purpose.
These babies are active climbers, using the claws on each wing to get a better grip as they maneuver through the trees. If they happen to fall, no worries—they’re also good swimmers. The one thing they’re not great at is flying. A chick has to wait several months before it’s mature enough to fly, and the adults aren’t exactly graceful in the air either.
