11 of 11 results for "filtered"
Video
One Small Filter, One Giant Step to Stop Polluting Our Oceans
Learn about the microfibers released by our washing machines that move through the food chain from plankton, to fish, and back to humans. Now, a filter that is fitted to washing machines will catch the particles and recycle them. This video is excerpted from BBC News.
Video
Who Decides?

In Who Decides?, host Radzi Chinyanganya discovers who decides what people see, read, and hear in the news. Because there are so many events and limited space to report the news, all news is filtered. In journalism, editors decide which stories are worth telling. The companies that run apps, social media, and websites, use computer programs called algorithms to decide which content individuals see. They might try to influence consumers’ views or emotions. Getting news from varied sources is the only way to ensure you’re seeing the complete picture. This video is excerpted from BBC’s My World, a program created for teenagers eager to learn more about the important stories shaping our world.

Video
The Evolution of the Jaw

The evolution of jaws transformed how the ancestors of bats and other vertebrates could feed and survive. This clip from BBC’s Evolution episode The Bat follows the ancient fish Metaspriggina, whose unusual front gill arches may have been an early step toward the development of jaws, allowing its descendants to move beyond filter-feeding and actively bite and capture prey.

Because the cartilage involved in early jaw evolution rarely survives in fossils, scientists also look to developing embryos for clues. The video shows how the same genes that control the formation of gill arches also help shape jaws, providing evidence of their shared evolutionary origin and showing how a structure once involved in breathing and feeding was transformed into one of the most important innovations in vertebrate evolution.

Video
The Unique Underwater Ecosystems of Submarine Mountains

In The Unique Underwater Ecosystems of Submarine Mountains, narrator Sir David Attenborough goes deep beneath the ocean surface, where volcanic eruptions have built enormous submarine mountains — some taller than Mount Everest when measured from the seafloor. These underwater peaks create unique ecosystems, as powerful ocean currents sweep nutrients up their slopes. This influx of nutrients supports vibrant marine communities, including soft corals, whip corals, and giant sponges that filter nourishment from the water. Though these ecosystems thrive in complete darkness, they rely entirely on the energy transported by deep-sea currents. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.

Video
Majestic Blue Whales Under Threat

In Majestic Blue Whales Under Threat, narrator Sir David Attenborough highlights the largest animal to have ever lived—the blue whale. Weighing nearly 200 tons, these gentle giants feed almost exclusively on tiny crustaceans called krill. By taking in massive gulps of water and filtering out krill, a single blue whale can consume up to four million krill per day. However, global environmental changes threaten the fragile ecosystem that supports these magnificent creatures. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.

Video
How Plants Thrive in Extreme Conditions

In How Plants Thrive in Extreme Conditions, narrator Sir David Attenborough describes plants that thrive in some of the harshest places on Earth. The dragon’s blood tree in Socotra uses its unique shape to catch the morning mist and water its roots, while the desert rose stores water in its thick trunk and grows right out of bare rock. Meanwhile, the red mangrove tree survives salty water by filtering out most of the salt through pores, showing how nature helps plants adapt to tough environments! This video is excerpted from BBC’s Life, a show that explores the remarkable strategies animals and plants use to ensure their survival.

Video
Plankton and Seaweed, Ocean Staples

In Plankton and Seaweed, Ocean Staples, narrator Sir David Attenborough explains how the basking shark eats and how the concentration of plankton supports the shark and other animals. Learn how seaweed grows in the waters off British Columbia. This video is excerpted from BBC’s Blue Planet, a definitive documentary series diving into the mysterious depths of the sea to discover the natural history of the world’s oceans and the rarely seen marine life that reside there.

Printable
Animal Fact File: Whale Sharks

What fish can grow longer than a school bus but feeds on tiny plankton? The whale shark is the largest fish on Earth — and one of its gentlest.

From tropical coastlines to the open ocean, these enormous fish spend their lives searching for tiny creatures drifting through the water. Discover how whale sharks use filter feeding instead of hunting, dive thousands of feet beneath the surface, and migrate incredible distances across the globe. You'll also learn why these gentle giants are endangered and how scientists are working to protect them for generations to come.

Teachers and parents, you can use this fact file to:

  • Introduce an animal, wildlife, or life science unit
  • Support nonfiction reading and vocabulary practice
  • Explore animal adaptations, behaviors, and habitats
  • Compare animals and the ecosystems they live in
  • Practice finding and organizing information from nonfiction texts
  • Prepare students for animal research projects or presentations (use our animal report templates!)
  • Connect science learning to conservation and environmental issues
  • Pair with videos, articles, or other informational texts (see Related Resources below)
News Clip
Could Pigs Solve the Organ Shortage?

Tim Andrews had end-stage kidney disease, which means his kidneys had almost completely stopped working. Then he got a transplant from a very unexpected donor: a pig.

Your kidneys work like filters. They clean waste and extra water out of your blood, and that waste leaves your body as urine. When the kidneys fail, many patients go on dialysis. A machine filters their blood for them, usually for several hours at a time, a few times a week. Dialysis keeps people alive, but it’s exhausting and takes up a lot of time. Tim depended on it before his transplant. Or, more precisely, before his first transplant.

Tim’s new kidney came from a Yucatán miniature pig, a small breed named after a region in Mexico. The pig had been genetically modified, which means scientists changed some of its genes. These changes made the kidney more like a human one, so Tim’s immune system would be less likely to attack it. Normally, the body treats an organ from another animal as an invader and rejects it. Tim lived for almost nine months without dialysis, longer than any living person who had received a pig kidney before him.

Eventually, Tim went back on dialysis for a short time. Then he received a second transplant, this time a kidney from a human donor. Other people have received pig kidneys, but Tim was the first to go from a pig kidney to a human one.

Living with a pig’s organ might sound strange, but doctors see real promise in it. In the U.S. alone, around 90,000 people are waiting for a kidney transplant, and there aren’t nearly enough human donors. Pig kidneys could one day act as a “bridge,” keeping patients healthy until a human kidney becomes available. Still, this isn’t a solution yet. Researchers are studying how long pig organs can last and whether they’re safe for many more patients.

Playlist
The Ultimate Shark Playlist

This BBC Learning Hub playlist explores the incredible world of sharks, from the sleek and powerful great white to the enormous whale shark and unmistakable hammerhead. Watch sharks hunt, feed, navigate vast stretches of ocean, and use finely tuned senses to understand the world around them.

Discover the adaptations that have made sharks such successful survivors. See how different species use speed, camouflage, specialized senses, and distinctive body shapes to find food and thrive in their habitats. And while sharks have a reputation as fearsome hunters, there’s much more to these animals than sharp teeth: some travel thousands of miles, some gather in huge groups, and others filter tiny organisms from the water.

Sharks have been swimming through Earth’s oceans for hundreds of millions of years. Dive in to discover what makes these ancient animals some of the most fascinating creatures in the sea.

Printable
Lesson 5: Inside the Newsroom

We’re live from the newsroom! Introduce your students to jobs, workflows, and decision-making processes of newsrooms. In this lesson, they’ll take on various roles and learn what makes up a functioning newsroom.