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There has always been a constant debate as to which is the best form of exercise, so it's time science finds the answer.

It's mostly about economic development.

The 104th Tour de France ended with Chris Froome wearing the yellow jersey and logging fastest overall time. Check out some of the best moments from cycling's greatest race with GoPro who was in the middle of it all.

South-to-North Water Transfer Project: The huge populations filling China's northern megacities have a shortage of the single most necessary resource for life: water. To solve that problem, the Chinese will soon be moving 44.8 billion cubic meters of fresh water each year from the wetter South to the dryer North.

Foodie fans, this one's for you! Whether you lean toward 1915-style roast beef and franconia potatoes, or if 2015's kale craze suits your taste, this look at food over the past century will satiate your palate.

Special thanks to SCJ for shooting - the ultimate breakfast sandwich for hangovers, one-night-stands, or both. This video was made in response to a Reddit AMA question: What's your favorite breakfast sandwich?

Jing-Jin-Ji: China is in the midst of a construction spree unparalleled in human history. These are the Megaprojects that will lift China into the future. China wants to make its capital, Beijing, the center of the world's largest supercity, by merging three provinces into one continuous megalopolis of 130 million people.

How have music icons changed over the last century? We look at how the styles of male icons have evolved over the years, from Duke Ellington and Bing Crosby to Michael Jackson and Prince.

Political correctness aims for some very nice results, but its means have a habit of upsetting a lot of people. Might there be an alternative to it? We think there is, and it's called Politeness.

We tend to imagine that we can only become addicted to a few sorts of things. But real addiction is about using something, anything, to keep our real emotions, fears and hopes at bay. There are many more addicts among us than we think.

We're used to thinking hugely well of democracy. But interestingly, one of the wisest people who ever lived, Socrates, had deep suspicions of it.

This video is about why it's harder to successfully land spacecraft and landers and rovers on Mars than on Earth, or Venus, or the Moon, or Titan, or asteroids. It all comes down to atmospheric density! When there's no atmosphere, you can do a powered descent in a flimsy tinfoil spacecraft like the Lunar Module, and when there's plenty of atmosphere you can do an unpowered descent via heat shield and parachutes like the space shuttle, Apollo command module, Soyuz, Huygens, etc. But on Mars with its thin air, you have to do both powered & unpowered descent, getting the worst of both worlds.

Glacier ice is weird. It's solid. Solid things aren't supposed to flow. But glacier ice flows like a liquid, and it does that without melting! How is this possible? I traveled to Mendenhall Glacier in Juneau, Alaska to find out.

Swiss researchers have come a step closer to building a better artificial heart. It's a squishy prototype that's 3D-printed from silicone.

Researchers at Stanford University developed a soft, squishy robot that "grows" like a vine and can squeeze through tight spaces. It can also lift heavy objects, which makes it potentially ideal for search-and-rescue operations.

Chris Atkeson, the creator of Big Hero 6's Baymax, wants to bring soft robots to the world.

Mexico's vast capital - Ciudad de Mexico, the largest city in the Americas - is threatened by a severe water crisis.

Kaden Casebolt, 5, has Osteogenesis Imperfecta, meaning his bones can break from sneezing. Despite his fragility, the superhero-obsessed boy loves dressing up as his heroes.

In assessing what material things are important and worth paying attention to, we're oddly prejudiced against cheapness - and frustratingly drawn to the expensive, for reasons that don't necessarily stand up to examination.

Lemon Pepper Wet is an Atlantan institution, virtually unknown outside the Peach State until Donald Glover's groundbreaking series made us salivate without even showing us the pay dirt. Look behind the Pulp-Fiction-style glowing MacGuffin and see the saucy, zesty wings underneath with this week's episode. Shout out to J. Kenji Lopez-Alt for his groundbreaking oven wing technique.

The philosophy of Kurzgesagt.