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
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?
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.
7 of the World's Oldest LIVING Organisms
Some creatures are such skilled survivors they live on the brink of immortality. Today, we will see 7 such creatures.
A Rainbow Made Only From Mushrooms If You Look Right
Mushrooms and other fungi aren't usually the most interesting, but if you find the right ones, they can fill your day with color!
This Is the Loneliest Tree in the World
This is a sad story of the world's loneliest tree, the Encephalartos woodii that resides in London's Royal Botanic Gardens
Mother Nature Is Here, Furious and Reclaiming Her Time!
Here are some structures of civilized society that tried to resist but were eventually beaten by nature and absorbed by the greenery
Lions! What You Didn't Know About This Amazing Creature
There is so much to know about this beautiful yet terrifying beast of the wild. This video takes you on a trip of discovery of numerous interesting things you probably didn't know about Lions.
13 Incredible & Intricate Homes of Animal Architects
The amazing homes animals build for themselves are both mesmerizing and brilliant. Behold nature’s most amazing architects.
The Family Canine: Get to Know All 15 Species of Wild Dogs
Watch as the extended family of the dog unfolds before your eyes.
15 Pictures Depicting the Rare Wonders of Nature
In this article, we display 15 unique photos of various natural phenomena - from rare eye colors to beautiful rock formations, and even albino plants.
Australia is the Land of the Most Bizarre Creatures!
Australia is the land of the most bizarre creatures!
The Ocean’s Floor Is Alive with Colorful Sea Slugs
The ocean is vast and mysterious, populated with alien like colorful creatures. These sea slugs are mesmerizingly beautiful.
Just How Clever Are Wild Parrots? See For Yourself!
Just how clever a wild cockatoo parrots? This man created a puzzle with seeds in it to see if they could solve it, and here's the footage...
The Story of the World's Most Poisonous Creature
This frog is the most poisonous creature in the world!
Breathtaking! Nature Has Never Looked This Beautiful!
Check out some of the finest photos from National Geographic's 2017 'Nature Photographer of the Year' awards.
Iguazu Falls Are Definitely Going on My Bucket List
Iguazu Falls are often called the most beautiful waterfalls in the whole world. Take a look at these stunning shots to see if you agree.
Animal Leanring: How Cats Apologize to Humans
Many people think cats don't know how to apologize or feel regret. However, cats harbor a depth of emotions that might surprise you.
Far, Far Away, There's a Land Where Pandas Roam Free...
Giant pandas are highly endangered, however there's a beautiful sanctuary in China devoted to ensuring that population numbers are boosted. See the photos.
WATCH: These Two Elephants Meet After 20 Years...
Being apart for 20 years can be hard, and when these 2 elephants finally met again, the results were simply beautiful.
Visiting the Tallest Moutain in NZ: Mount Cook Adventure!
Don't miss out on this opportunity to witness the splendor of this unique destination.
These Are the Best Photos of Horses That You'll Ever See!
Iceland is a place that is full of beauty...even the horses are absolutely majestic. Take a look!
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.
Spore to Fungi: The Lifecycle of Mushrooms in Fast-Forward
Enjoy this look into one of nature's most incredible shows: the lifecycle of the mushroom in time-lapse over 2 years.
Have You Seen a Predator as Tiny and Adorable as This?
The Fennec Fox is the world’s smallest fox. Want to know more about this cute animal? Watch this video.
15 Wildlife Photos SO Bad They Are Actually Funny
Here is a look at a collection of hilarious pictures of wild animals that are so bad they will actually make you laugh.
Here Are 12 of the Strangest Lakes on the Planet
We present to you 12 of the strangest lakes on our planet.
Dr. Hodges - The Vet That Cures Exotic Cute Pets
In this video, we meet Monty, the pet axolotl. It's his first visit to the Vet!
The Most Frightening and Bizarre Creatures of the Ocean
Terrifying and alien creatures of the dark depths of the ocean
Say Hello to the Tiniest Bird You'll Ever See!
How small is the tiniest bird ever recorded? Watch this video and find out!
INTERACTIVE: Click to See the English Tide Come and Go...
This interactive photo presentation lets you click on images taken by Michael Marten, and see the English tide coming in and going out.
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.
15 Things You Never Knew About the Panda Bear
When you hear about pandas, you think big, cute and cuddly, but there is much you might not know about these gentle giants...
From Alabama to Wyoming: 50 States Blessed with Fall Colors
Before the winter months take over, let's enjoy the beauty of fall in 50 U.S. states.
Discover the World of Powerful Big Cat Hybrids
There are types of big cats you've never heard about, and they're big. beautiful and powerful! Below are photos along some information about these big cat hybrids.
Together, These Animals Create Breathtaking Scenes
When people stand together, they become strong! When animals come together, the results are magical!
Soak in the Beauty of Our Planet With These Stunning Photos
Take a look at these stunning photos of our beautiful planet Earth.
West Canada is Wild, Strong and Ever So Pretty
The wilds of West Canada are some of the most jaw dropping natural scenes in all the world we live on.
This is the Smallest Wild Dog You've Likely Seen
This little wild dog was recently thought to be extinct.
These Tiny Creatures Made Me Smile All Day Long
Animals come in many shapes and sizes. But they all start at one size - small! One can hardly look at a baby animal without feeling a sense of kinship, a desire to protect, and uncontorllable urge to say: "awwww".
Human Cultivation Changed These Plants Beyond Recognition!
These 8 familiar fruits and vegetables changed so much when people started cultivating them, you won't be able to recognize them!
Seeing These Pretty Flowers Will Put a Smile on Your Face
These flowers as so pretty it hurts. Just viewing them will put a smile on your face and brighten up the rest of your day.
Nine Deceptive Animals for Whom Every Day Is Halloween
Natures most amazing shapeshifters and masters of disguise
Did You Know Earwigs Could Fly? Watch It Slow Motion
Earwigs are not the cutest insects, but they have a cool trick up their sleeves!
Learn How Wolves Evolved Into Domestic Dogs
Ever wondered how wolves ended up evolving into the dogs that we all know and love? Find out how it happened in this article.
This Woman Takes Incredible Wildlife Pics With Hidden Cams
A woman has set up a secret camera in her backyard bird feeder and ends up capturing the most interesting wildlife photos.
These Rapid Blooming Flowers Will Brighten Your Day
This video of flowers blooming will brighten your day. So, go ahead, treat yourself to a few minutes of beauty and relaxation.
These Are Definitely the Oddest Couples I Could Imagine...
These strange couples destroy all my previous notions about animal relationships.