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
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.
Ever Seen a Monkey Play Pong With Its MIND?
You're about to see TWO incredible things in this video.
How Do Wild Animals Survive Winter Without Shelter?
Learn all the genius biological mechanisms animals use to survive winter in the wild - without central heating or warm socks.
These 10 New Species Were Only Discovered in 2018!
From creatures the size of office blocks to those that are only visible when viewed under a microscope, the 10 newly-discovered species are wonderful!
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?
This Plant's Sting Lasts YEARS After the Initial Impact
In this article, we will share six of mother nature’s plants you literally wouldn’t want to run into ever in your life.
War of the Carnivores: Full Length Wildlife Documentary
These fierce warriors contest each other in a raw, untamed spectacle of survival, where every moment counts. Brace yourselves, the battle begins.
These Colorful Birds are Among the Most Vibrant!
These birds are so bright and beautiful that it's actually hard to believe they're real. Take a look at these 19 kaleidoscopic bird species 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.
Wild Nature: Young Elephant Fends Off 14 Lions Unharmed
How an elephant convinces a group of lions that this is not an animal worth tangling with...
Woodpeckers Are So Captivating!
Did you know that there are over 200 species of woodpeckers in the world? Let’s check out some of the most fascinating ones.
Meet the Giant Cassowary – The Modern-Day Dinosaur
Meet the most dangerous bird on Earth, the giant cassowary, that is also regarded as a modern-day dinosaur.
16 Bizarre Facts That Are So Strange They Could Only Be True
Sometimes science is so bizarre it blows the mind. Read These 16 fascinating facts that prove that truth is stranger than fiction.
There are So Many Reasons for Us to Love Penguins
Penguins are as beautiful as they are fascinating. Here is all you need to know about these wonderful birds...
These Animals Can Teach Us a Thing or Two About Love
Love. It's not only an emotion expressed by humans. Here are 15 beautifully captured photos of animals that can't help but showcase their love to one another.
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.
Horse Kingdom: Exploring the 15 Most Stunning Horse Breeds
Many beautiful horse breeds have been developed over the course of the centuries, but some are more beautiful than others... Take a look.
HEARTWARMING: Animals Embracing Newfound Freedom
In this touching compilation video of animals tasting freedom for the first time wwill melt your heart.
Explore the Secret World Of The Jellyfish With This Video
This full documentary will help you get a better understanding of the world that jellyfish inhabit.
These Photos Appear To Have Been Taken In Another World...
Planet Earth is an incredible place - so incredible that we sometimes don't even recognise it. These locations could easily double up as alien planets.
Marvel at 14 of the Tallest Mountains in the World
There are fourteen mountains in the world that stand over 8000 meters (26,250 feet) tall. Known collectively as the 8000ers, these skyscraping peaks are very literally the top of the world.
16 Fascinating Plants You Have to See to Believe!
How many of these interesting plants have you seen before?
These Award-Winning Wildlife Photos Are Phenomenal
View some of the best entries from the 2017 edition of GDT's ‘European Wildlife Photographer of the Year' competition. Take a look.
10 Vegetables and Plants You Can Grow in the Fall
Just because we're approaching fall it doesn't mean you should hang up your gardening gloves. There's still plenty of things you can plant in your garden.
Hilarious Nature: True Facts About Elephants!
Come with us as we explore this huge mammal, make some jokes and meet one of the smartest and most fascinating of all animals, the elephant.
15 Mind-Blowing Facts About Our Feathered Friends
From your friendly neighborhood crow to some of the rarest bird species in the world, here are 15 fantastic facts about birds.
The Animal Kingdom Now Has the Photographer it Deserves
Sergey Polyushko could be one of the world's finest animal photographers in history. Just look at these 17 fantastic snaps.
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.
How Do Animals Communicate with Each Other? Fascinating!
Discover how some animals communicate with one another... fascinating!
The Wonders of the Maasai Mara in 10 Award-Winning Photos
Prepare for the wildlife adventure of a lifetime!
Photographer Captures Myriad Moods of Stunning Big Cats
Observing big cats from up close is rare. Here are some brilliant big cat portraits that take you real close to these magnificent animals.
The Colors of These Birds are Ravishing!
Birds inspire us, fascinate us and make us admire them with their beauty and grace. Enjoy some beautiful pictures of 14 of the most colorful birds in the world.
These Photos Prove How Colorful and Beautiful Our World Is
Our planet is so beautiful and full of color, and these photo go a long way to proving just that.
These Photos Prove Mother Nature Can Be So Creative!
These photos prove that Mother Nature has a creative side.
This Microscopic Animal is Probably Immortal
Not unlike the mythical hydra, real life hydras are microscopic organisms that have incredible regenerative abilities...
Spring Is Here: 8 Spring Flowers You Can Plant Right Now
These flowers will make your garden look marvelous in the spring time.
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.
The Internet's Burning Questions About Biology, Answered
Watch biologist Thor Hanson answer some fascinating questions about biology in this video.
You Won't Believe the Equine Wonder in These Horse Photos
Wiebke Haas captures some of the world's most beautiful horses strutting their proud stuff in this superb collection of equine majesty.
This Photographer Captured the Majesty of Maine Coon Cats
Photographer Robert Sijka is a cat aficionado, and he also happens to be an excellent photographer. Take a look at his work with Maine Coon cats.
This Video Opens Up a World of Flowers, Beauty and Color
A beautiful video of young flowers opening in stunning colors.
Your Ultimate Guide to All Breeds of Cat!
From Balinese to a Scottish Fold - there are many breeds of cats, and you'll find them all here!
10 Perennials That Will Serve Your Garden for Years
Here, we look at some amazingly useful perennial vegetables that will serve as a long-term investment for every gardener.
Feast Your Eyes: 50 Stunning Sceneries From 50 US States!
The US is full of magnificent places, in each and every state...
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.
Have You Ever Seen Birds More Stunning than These?
Among all species, birds are perhaps the prettiest. Take a look at the world's most beautiful birds:
7 Surprising Animals That Have The Ability To ‘Fly’
Here's a look at some unique and surprising members of the animal kingdom that have developed the ability to fly through the air.