Nature of Electricity​ | Basic Concepts | Basic Electrical Engineering

Nature of Electricity According to Modern electron theory of matter, all matter whether solid, liquid or gas is composed of very small particles called molecules. A molecule is n turn made up of atoms. An atom consists of a central part called nucleus and around the nucleus (called extra-nucleus), there are a number of electrons […]

“Lightning and Electricity” | practice English with Spotlight

Welcome to Spotlight. I’m Anne Muir. And I’m Colin Lowther. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. The sound of thunder. Lightning is bright in the sky. The storm is coming closer. Some people hide in fear. They put […]

3 Ways Trees Can Save the Climate (With Our Help)

Hey smart people, Joe here. Fact: Earth is experiencing climate change on a scale and pace never before seen since our species has been on the planet, and we’re causing it by pumping more heat-trapping carbon into the atmosphere than Earth’s natural systems can take out. Now fixing a problem as massive as climate change […]

Fashion has a pollution problem — can biology fix it? | Natsai Audrey Chieza

You’re watching the life cycle of a Streptomyces coelicolor. It’s a strain of bacteria that’s found in the soil where it lives in a community with other organisms, decomposing organic matter. Coelicolor is a beautiful organism. A powerhouse for synthesizing organic chemical compounds. It produces an antibiotic called actinorhodin, which ranges in color from blue […]

Why Is Blue So Rare In Nature?

[PBS Bumper] [OPEN] There are no blue tigers. No blue bats, no blue squirrels, or blue dogs. Even blue whales aren’t that blue. Animals come in pretty much every color, but blue seems to be the rarest. What’s cool, though, is when we do find a blue animal, they’re awesome looking. Nature doesn’t do halfway […]

From Shells to Solar Cells

[MUSIC PLAYING] I really appreciate beautiful structures that organisms make that become shells, but what about a semiconductor? What about a battery? What about something that’s more useful to me? My name’s Angela Belcher and I’m a professor of biological engineering, material science engineering, and the Cancer Institute at MIT. The focus of my work […]

Will Climate Change Stop If We Stop Emitting Carbon Tomorrow? | Hot Mess 🌎

Imagine that aliens landed and gifted us a clean, limitless energy source. And instead of killing each other over this technology, we decided to immediately transform the world into a carbon-free society. [animation shows closing drilling rigs, oil refineries, and coal and natural gas plants.] This wonderous source would power our homes, industries, cars and […]

When Electric Eels Attack

From its ability to produce electricity to a number of people who’ve suffered its powerful shock, this is what happens when electric eels attack. Today’s video was requested by Crazy Wright. If you have any other topics you’d like to learn about, subscribe and let us know in the comments section below. Number 5 Kenneth […]

Can peer pressure be harnessed to fight climate change?

JUDY WOODRUFF: How people vote in an election certainly can be affected by peers, friends, family and neighbors. That’s also true with some of our economic choices and what we buy. Tonight, economics correspondent Paul Solman explores how those forces could potentially be marshaled for other constructive purposes. It’s part of our regular series, Making […]

Pluto 101 | National Geographic

– [Instructor] At the edge of the solar system Pluto pushes the boundaries of our understanding of the universe. Nestled within the far flung Kuiper belt the dwarf planet is believed to be one of the countless celestial objects left over from the formation of the solar system. While it is one of the Kuiper […]