Tag «mars»

The Fermi Paradox — Where Are All The Aliens? (1/2)

The Fermi Paradox — Where Are All The Aliens? (1/2)

Are we the only living things in the entire universe? The observable universe is about 90 billion light years in diameter. There are at least one hundred billion galaxies, each with one hundred to one thousand billion stars. Recently, we’ve learned that planets are very common too. And, there are probably trillions and trillions of …

Earth 101 | National Geographic

Earth 101 | National Geographic

– [Narrator] Earth, the only planet known to maintain life. A product of scientific phenomena and sheer chance. This blue speck in space holds the past, present, and future, of our very existence. (instrumental music) Approximately 4.5 billion years ago, the Earth formed from particles left over from the creation of our sun. Gravity drew …

Why danger symbols can’t last forever

Why danger symbols can’t last forever

You probably know how this symbol is supposed to make you feel. And this one. This one too, even if you’re not sure exactly what it means. But what about this? This symbol — The Jolly Roger — was once one of the most feared symbols in the world. It represented death, pirates, and poison. …

The search for life on Mars | Natural History Museum

Is there life on Mars? Has there ever been? These questions have inspired science and science fiction alike. But a mission, led by the European and Russian Space Agencies, might finally reveal what really lies beneath the surface of the Red Planet. We’ve been sending missions to Mars since the 1960s to find out what, …

The History of Hong Kong

Throughout modern history, world powers have repeatedly fought over this strategically valuable land. Its name means “fragrant harbor” in Chinese, but it could also mean “City of Change.” This is the story of Hong Kong. The first wave of people to arrive in large numbers had fled Genghis Kahn and his brutal Mongol hordes. They …

Why graphene hasn’t taken over the world…yet

Why graphene hasn’t taken over the world…yet

– [Cory] It may not look like it, but I’m creating one of the strongest and most versatile materials on Earth, graphene. You’ve probably heard buzz about it. Graphene made big waves back in 2004, and it’s knocked around science news ever since. – A global race for graphene. – You know, it’s not just …

Why Mars Died, and Earth Lived

The Mars rover, Curiosity, is the latest in a long line of missions to Mars… Landers sent to scoop its soil and study its rocks, orbiters sent to map its valleys and ridges. They are all asking the same question. Did liquid water once flow on this dry and dusty world? Did it support life …