يحاول ذهب - حر

THE AMAZON

March 2023

|

BBC Science Focus

THE WORLD'S BIGGEST, MOST BEAUTIFUL, AND MOST BIODIVERSE RAINFOREST

- DR HELEN PILCHER

THE AMAZON

WHAT IS IT?

The Amazon rainforest is the largest remaining tropical rainforest in the world. It's also the most biodiverse. One in ten of all known species are found here, including many that are endangered and found nowhere else. It's big and it's beautiful, and it's vitally important, not least because it stores vast amounts of carbon, influences rainfall patterns across South America, and affects climate on a much broader scale. In the last 40 years, around a fifth of the rainforest has been felled or burned to make way for cattle ranches and other activities. Now scientists fear it's on the verge of irreparable damage. We lose it at our peril. We need to act now to save one of the world's last true wonders.

WHO LIVES THERE?

People have been living in the Amazon for at least 10,000 years. Ancient settlers cultivated native trees such as the Brazil nut, maripa palm, and cocoa tree, and in time this influenced the rainforest's makeup. The southwestern section, for example, is rich in these species.

When the first Europeans arrived in South America in the late 15th Century, there were about 6.8 million indigenous people living there. The colonists carried infectious diseases, such as malaria and influenza, that killed millions of Amazonians. Thousands more were enslaved or displaced.

المزيد من القصص من BBC Science Focus

BBC Science Focus

BBC Science Focus

ARE PSYCHOPATHS REALLY THAT GOOD AT LYING?

Picture infamous psychopaths from fiction, such as the eerily cold and calculating Patrick Bateman in the film adaptation of American Psycho, and they certainly seem like master deceivers. But what about real-life psychopaths? Research confirms that psychopaths are more inclined to lie to get what they want, and that they typically display a striking fearlessness - as if they have ice running through their veins.

time to read

1 min

January 2026

BBC Science Focus

WHY DO WE HAVE TWO OF SOME ORGANS, BUT ONLY ONE OF OTHERS?

The majority of animals on Earth, humans included, are bilaterally symmetrical. It means we can be divided roughly into two mirror-image sides. Evolutionary biologists believe that it has been like that for at least 300 million years, and because life organised this way survived, so did symmetrical design. Hence, two eyes, two ears, two lungs and two kidneys.

time to read

1 min

January 2026

BBC Science Focus

BBC Science Focus

WHY DO CATS PREFER TO SLEEP ON THEIR LEFT?

I've said it before, and I'll keep saying it again and again and again: who knows why cats do anything?

time to read

1 min

January 2026

BBC Science Focus

BBC Science Focus

FORGET COUNTING CALORIES TRY THIS INSTEAD...

Calorie counting isn't just difficult, it's riddled with problems that make it practically useless for anyone trying to lose weight.But there are alternatives

time to read

9 mins

January 2026

BBC Science Focus

BBC Science Focus

SIGNS OF LIFE

The more planets we find outside our Solar System, the better our chances are of finding life on one of them. But if there really is life out there, how do we spot it?

time to read

8 mins

January 2026

BBC Science Focus

WHAT ACTUALLY MAKES SOMEBODY COOL?

Most of us have probably wanted to be cool at some point in our lives, and these efforts can have a big influence on the things we buy, the way we dress, the hobbies we invest in, the people we look up to and even the words we use.

time to read

2 mins

January 2026

BBC Science Focus

BBC Science Focus

It's TIME to WAKE UP and SMELL the roses

What if the pursuit of happiness in the traditional sense – chasing wealth or power – is the very thing stopping you from being happy? Researchers are beginning to understand that spending time enjoying the simple things might be the secret ingredient to enjoying a happy, healthy life

time to read

8 mins

January 2026

BBC Science Focus

BBC Science Focus

THE AARDVARK

In a time when people are being asked to consider eating insects, we should, perhaps, learn a thing or two from the aardvark (Orycteropus afer), Africa’s ant-guzzling gourmand. On an average night, the big-schnozzed mammal devours up to 50,000 of the crunchy critters.

time to read

2 mins

January 2026

BBC Science Focus

BBC Science Focus

ADD WEIGHT TO LOSE WEIGHT

A very basic kind of wearable could make your New-Year-weight-loss plans stick

time to read

3 mins

January 2026

BBC Science Focus

BBC Science Focus

AHEAD OF THEIR TIME

The Maya civilisation is known for its art and architecture.

time to read

8 mins

January 2026

Translate

Share

-
+

Change font size