How to Build a Better City

More than half of the world's population already lives in cities, and another 2.5 billion people are projected to move to urban areas by 2050. The way we build new cities will be at the heart of so much that matters, from climate change...

Freedom from cars, freedom from sprawl, freedom to walk your city! City planner Jeff Speck shares his "general theory of walkability" -- four planning principles to transform sprawling cities of six-lane highways and 600-foot blocks into...

Urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine....

urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine....

By 2100, the UN estimates that the world's population will grow to just over 11 billion people. Architect Vishaan Chakrabarti wants us to start thinking about how we'll house all these people -- and how new construction can fight climate...

In this video Paul Andersen explains how land is developed for human use. Urbanization has occurred through the last century as people have moved to cities in large numbers. Transportation and the arrival of the car have led to urban...

How to Build a Better City

Howcast - Learn techniques to take the back from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video, part one of two.

Howcast - Learn the countering double and sprawl takedown defenses from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do the single leg counter from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video, part one of two.

Howcast - Learn how to do the failed double leg takedown from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do basic strike combinations from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn drills and fundamental movements from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to throw a cross from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do an anaconda choke or gator roll MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do an arm triangle choke from mount MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a belly down arm lock MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a 10-finger guillotine MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Three-letter consonant blends have three consonants with no vowels separating them. You say the sound of each letter when you pronounce these blends, just like with 2-consonant blends. Learn to read words that have str, spr, spl, and scr.

This animated phonics song helps children learn the sound of the beginning blend SPR in English. A blend is a combination of letters where each letter makes its own sound. The sounds of the letters are blended together. Fun characters...

Mixed martial arts (MMA) is a full contact combat sport that combines techniques from various martial arts and combat sports. MMA fighters integrate different techniques and strategies, such as the sprawl and brawl tactic, ground and...

How did dinosaurs get their names? What were the dinosaurs like? How long ago did they live? Can a dinosaur be created from DNA? Did they take care of their young? Why did they die out... or did they? This is part 1 from the series...

When Landsat 5 launched on March 1, 1984, Las Vegas was a smaller city. This image series, done in honor of the satellite's 28th birthday, shows the desert city's massive growth spurt since 1972. The outward expansion of the...