Nature

Nature

How big can a tree become?

Trees have a natural growth limit of about 130 metres. They can only grow to this height because water must be able to reach the top via capillary channels and it has to fight against gravity to do so. The biggest tree in the world is a giant redwood called Hyperion.

Nature

How many trees exist?

About 3.5 trillion trees exist worldwide – around 500 trees for every man, woman and child.

Nature

Is global warming causing more storms?

No, there won’t be more storms – but the storms themselves will be stronger. “The recent measured data indicates that cyclones, hurricanes and the like will become more powerful in the future,” says Frederic Laliberte, atmospheric physicist at the University of Toronto.

Nature

How do you tow an iceberg?

A 600,000-ton iceberg is heading straight for the Hibernia oil rig, the world’s biggest offshore drilling platform. As much as 200 million litres of crude oil are stored here – and a collision would have devastating consequences for the waters of the North Atlantic.

Nature

Which mushrooms can glow green?

Scientists estimate that there are at least 1.5 million types of mushroom on Earth. Of this number, just 71 have bioluminescent properties. These mushrooms, one of which is Mycena lucentipes, are able to illuminate themselves thanks to a biochemical reaction that takes place in their cells.

Nature

Do trees get headaches?

When researchers in California studied the air in a forest full of walnut trees, they discovered the substance methyl salicylate. This is closely related to the active ingredient in aspirin.

Nature

How do birds see under water?

Some birds are true all-rounders, hunting not only in the air and on land, but also underwater – like the Atlantic puffin. But how does the seabird manage to see beneath the surface? Scientists discovered that the puffin has both an upper and lower eyelid.

Nature

How are animals reacting to climate change?

New observation by scientists at the University of Alaska revealed something astonishing: the red fox is conquering the territory of the Arctic fox – it has been sighted for the first time in the northernmost part of Alaska (photo).

Nature

Do turtles visit the car wash?

Sea turtles are some of the ocean’s great wanderers, often travelling thousands of miles in one go. This nomadic lifestyle can get quite exhausting, which might be why turtles hire ‘cleaner fish’ to help keep themselves squeaky clean.

Nature

Is the Milky Way actually invisible?

Almost everything we can see with the naked eye in the night sky belongs to our Milky Way – and it’s not just the streak of light visible in this photo. The sky might look endless – but around 20% remains hidden, out of sight to even the most powerful telescopes.

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