The vast majority of documented cases of plant cancer have been caused by external pathogens, such as bacteria, viruses, or pests. They can't get cancer from carcinogens like the sun's radiation or air pollution.
There are two common forms of cancer in trees. One causes crown galls and is triggered by the bacterium Agrobacterium tumefaciens. You've probably seen this at least once in your life, it looks somewhat like this:
Crown gall on a eucalyptus/Source
Beautiful Flowers in All Shapes and Sizes - Incredible!
Let’s take a moment to contemplate and celebrate the beauty of nature by turning our attention to 15 outstanding flowers and plants across the globe.
Why Do Cats Like Catnip?
Are they really getting "high," or is there scientific logic behind cats' love of catnip?
Welcome to the Seed Bank in Kew Gardens, London
Welcome to the bank in Kew Gardens. It won't ever hold money, but it is bomb-proof. What is guarded there?
The Unlikely Bullies of the Underwater World
The story of the giant water lily, an underwater bully that takes over habitats to itself and won't share.
Hammerhead Sharks - Eevolution's Strangest Turn
Around 20 million years ago evolution introduced hammerhead sharks. Why did evolution make such a surprising turn and what makes these sharks so uniqe?
This Sea Creature Can Live a Whole Year Without Food!
We're taking a look at some interesting sea creatures that can photosynthesize like plants.
This Has to Be the Most Adorable Predator You'll Ever See
Polar bear cubs are absolutely adorable, and Nora is no exception. The Oregon Zoo decided to send her off with a video of her younger days.
8 Animal Myths You’d Swear Are Scientifically Proven Truth
Do goldfish have a 3-second memory span? Can porcupines shoot their quills? The 8 most commonly believed animal myths.
Best of BBC: 7 Animal Videos You HAVE to Watch
Feast your eyes on 7 perfect animal moments, from the cute to the colorful, from the beautiful to the menacing - these BBC videos are gorgeous.
You Won't Believe How Long These Animals Can Live For!
What do you think the longest-living life-form on Earth is? This video has all the answers!
Take a Trip Off the Beaten Track Through Iceland...
Watch in awe as this stunning video takes you off the beaten track through the wild heart of Iceland.
A Skilled Photographer Can Turn Our Planet into Paradise!
What an incredible world we live in! This breathtaking photos capture nature at its finest!
Are These the Coolest 70 Year Olds Ever?
These women have made their livelihoods by hunting sea snakes on the coast of their island.
Some Animals Are the Unsung Heroes of Our World...
The heroism of animals often goes unsung, so that's why we created a little tribute to some of the most heroic animals ever to live. Here they are!
Find Out More About North American Butterflies Here
Mankind has always been fascinated by butterflies and that fascination hasn't died down today. Take a look at these informative images.
When Animals Cooperate: 10 Incredible Examples!
Discover how certain animal species help others in a way that makes you appreciate the beauty of nature more than ever.
The Beautiful Animals You'll See When On Safari...
If you want the best safari experience, Africa is where you should go, especially if you want to see the big five wild animal groups: the lion, the leopard, the elephant, the rhino and the buffalo.
Visit the World's First Commercial Coral Farm
This process is called assisted evolution, and it sheds the future in bright light.
This Photographer Documents the Tiniest Sea Creatures
These tiny creatures are unlike any other fish you've seen in the sea... Take a look and see them for yourself!
This is How Mountain Goats Defy Physics and Gravity
They're known to be able to defy the laws of physics, and today we'll discover exactly how they do that.
These Rare Mushrooms Can Glow In the Dark
Only about 70 mushroom species out of 14,000 have this beautiful and rare ability.
WATCH: Do Cats REALLY Get Attached to Their Owners?
From all the different types of animals that are kept as pets, cats are among the most aloof. So, do they miss their owners after all? Find out in this video.
Nature is Astounding! Here Are 11 Reasons Why.
The natural world, with all its plants, animals and landscapes, is full of wonder. It never stops being fascinating. Enjoy these 11 facts from around the world.
This Microscopic Animal is Probably Immortal
Not unlike the mythical hydra, real life hydras are microscopic organisms that have incredible regenerative abilities...
I Can't Stop Laughing at These Cows Who Think They're Dogs
A cow probably isn't the first thing that springs to mind when thinking of man's best friend, but here are 16 photos which prove that they actually are!
When it Comes to Camouflage, These Animals Are the Masters
When it comes down to hiding, the following animals are complete masters. Spot them if you can!
Nature Is Full of Mystery When You Look at These Photos
Take a look at these amazing photos of nature which depict so much mystery.
The Beautiful and Elusive Snow Leopard of the Himalayas
The snow leopard is one of the most poorly-understood cats in the wild, mainly because it's so hard to see one that doesn't want to be seen.
9 of the Most Fascinating Night-Singing Birds
Enter the fascinating world of birds that chirp mellifluously at night.
Hummingbirds Come in the Most Beautiful Rainbow Colors!
There are hundreds of gorgeous species of hummingbirds. Have you spotted any of these near you?
Beautiful & Weird Creatures of the Sea - Collection
In this collection, you'll find some of the most strange, beautiful and remarkable creatures under the waves.
Rain Adds So Much More Beauty to Nature...
Flowers are way more beautiful after some rain has fallen. Don't believe us? Check these photos out then!
Discover the Life of the Ocean's Most Cunning Creature
Discover the fascinating world of the octopus, and see for yourself exactly why scientists consider them to be one of the most intelligent creatures on Earth.
The Truth About Nature’s Most Misunderstood Animals
Bats, hyenas, vultures, snakes, and more – today we will shed light on the world’s most misunderstood animals.
14 Gorgeous Flowers and the Beautiful Meanings Behind Them
We all enjoy the look and smell of flowers, but did you know that each flower has its own meaning? Learn the interesting symbolism behind 14 popular flowers.
A Bird Ballet - Beautiful!
A filming crew was shooting a commercial when they suddenly noticed thousands and thousands of birds came and made this incredible dance in the sky.
8 Great Reasons Why You Should Eat More Grapefruits
Grapefruits are one of the healthiest fruits around, and here 8 amazing health benefits of this delicious fruit.
These Photos Capture the Atmospheric Landscapes of Iceland
Enjoy this collection of beautiful photos that capture the beauty of Iceland’s landscapes.
You've Got to Watch This Cute & Hilarious Monkey Video!
You've got to check out this video, which contains some of the most outrageous yet adorable monkey footage you'll ever see!
These Natural Phenomena Will Leave You Speechless!
Take a look at this incredible natural phenomena.
The Beauty That Resides Under the Sea: Award-Winning Pics
Check out the outstanding winners of the Underwater Photographer of the Year 2023.
21 Gorgeous Reasons Nature Needs No Photoshop
You'll be impressed by 21 nature pictures that prove the world is beautiful the way it is if you only know where to look.
This Amusing Video Explains How Cats Land on Their Feet!
Have you ever wondered just how cats manage to safely land on their feet every time they fall or are dropped? Watch this video and wonder no more!
This Post Will Clear Up Any Misconceptions About Dogs
There are numerous misconceptions concerning the best ways that we should interact with dogs. This post will definitely clear everything up.
17 Trees Almost Too Beautiful and Strange To Be Real!
Trees are great, aren’t they? Nature is full of great wonders, but few are as startling as these bizarre but beautiful trees.
Fly Through the Most Royally Stunning Castles of Europe!
I love this wonderful drone footage of the great castles and palaces of old Europe so much I just had to share it with you. It's a true life fairytale.
Beauty in Nature: A Gorgeous Moment in the Animal Kingdom
Watch these flamingos disrupted by wild horses!