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As soon as NASA announced finding evidence of liquid water on Mars last month, speculation erupted that scientists may be able to answer the age-old question: Is there life on Mars?

Technically, we already know the answer.

"The answer is, 'Yes,' and it's probably our own life," says David J. Smith, a scientist at NASA's Ames Research Center in Mountain View.

Here on Earth, bacteria cover every surface we touch. And despite efforts to keep spacecraft as clean as possible, bacteria have likely hitchhiked all the way to Mars on NASA missions. Bacterial contamination was detected on the rovers that have driven across the red Martian desert.

On September 27th, 2015 there will be a very rare event in the night sky - a supermoon lunar eclipse. Watch this animated feature to learn more.

This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11981

ere's a crack in California. It stretches for 800 miles, from the Salton Sea in the south, to Cape Mendocino in the north. It runs through vineyards and subway stations, power lines and water mains. Millions live and work alongside the crack, many passing over it (966 roads cross the line) every day. For most, it warrants hardly a thought. Yet in an instant, that crack, the San Andreas fault, could ruin lives and cripple the national economy.

For an animal with such a humble name, market squid have a spectacularly hypnotic appearance. Streaks and waves of color flicker and radiate across their skin. Other creatures may posses the ability to change color, but squid and their relatives are without equal when it comes to controlling their appearance and new research may illuminate how they do it.

One new power plant is aiming to change that. Copenhagen's new waste-to-energy plant, the Amager Resource Center built by the Bjarke Ingels Group will have both a ski slope and a rock-climbing wall on its modern exterior, while inside, household waste is incinerated and turned into energy. It's a relatively clean process, but still one that generates CO2.

And that's why it's not great news that bees haven't been doing so well in recent years. Last year, the United States lost 40 percent of its honeybee population, a devastating loss. No one is exactly sure what's causing the collapse, but climate change, pesticide use, disease, and habitat loss are all suspect. And other countries around the world are having the same difficulties. In Norway, which also noticed declines in bee populations, people are creating a 'bee highway' that gives bees a safe haven in the middle of the country's capital city.

ees pollinate a third of everything we eat and play a vital role in sustaining the planet's ecosystems. Some 84% of the crops grown for human consumption - around 400 different types of plants - need bees and other insects to pollinate them to increase their yields and quality. These include most fruits and vegetables, many nuts, and plants such as rapeseed and sunflowers that are turned into oil, as well as cocoa beans, coffee and tea. Crops grown as fodder for dairy cows and other livestock are also pollinated by bees. And it's not only food crops that rely on bee pollination, cotton does as well. As a result, annual global crop pollination by bees is estimated to be worth $170bn.

Scientists believe there is an ocean hidden beneath the surface of Jupiter's moon Europa. NASA-JPL astrobiologist Kevin Hand explains why scientists are so excited about the potential of this ice-covered world to answer one of humanity's most profound questions.

Undersea footage provided by John Delaney, University of Washington

Could a liquid water ocean beneath the surface of Jupiter's moon Europa have the ingredients to support life? Here's how NASA's mission to Europa would find out.

Mission Overview: Why Go to Pluto ? Planetary exploration is a historic endeavor and a major focus of NASA. New Horizons is designed to help us understand worlds at the edge of our solar system by making the first reconnaissance of Pluto and Charon - a "double planet" and the last planet in our solar system to be visited by spacecraft. Then, as part of an extended mission, New Horizons would visit one or more objects in the Kuiper Belt region beyond Neptune.

The New Horizons mission will help us understand worlds at the edge of our solar system by making the first reconnaissance of the dwarf planet Pluto and by venturing deeper into the distant, mysterious Kuiper Belt - a relic of solar system formation.

Now, in a newly released view of Europa's cracked surface, ruddy veins of hydrated salts mixed with chemicals such as magnesium sulfate or sulfuric acid break up bluish slabs of pure water ice. Compiled from data collected by NASA's Galileo spacecraft, this image release only amplifies our fascination for the moon.

NASA is studying Ceres -- a protoplanet. We are interested in Ceres simply because it is FULL of water. Scientists think that bodies like Ceres could be the source of water on earth. Collisions of two or three of these bodies could have brought all of our water.

Saturn has a ring that is 6 million miles wide.

A new documentary from NASA tells of the difficulties of sending an astronaut into cold, deadly space, plus how far we've come since Gemini 4. Since the days of the first "extra-vehicular activities", spacewalks have allowed mankind to walk on the Moon, build the International Space Station, and save the Hubble telescope. And we're not done yet. Future spacewalks will take us even farther-to asteroids orbiting the Moon, and eventually, Mars. Check out the documentary to learn more: