How much water is on Earth?

How much water do you think there are on Earth? Approximately 70% of the surface of the Earth is covered by water, and oceans contain about 96.5% of all water from the planet. But there is water in the air as water vapor, in rivers and lakes, ice caps and glaciers, as moisture in the soil and groundwater, even in your body and your dog. However, all that water is in the "small" area of ​​1,385 km in diameter.

The Earth will not end in 2012

On December 31, the Gregorian calendar did something frightening. He spent the years 2011 to 2012. What we experience as the year came to an end? Earthquakes? Globally? A planetary collision? Stranger gravitational effects caused by an alignment with the galactic plane? Is the impact of a comet? 'Lighting' Earth?

As much as I wish it were true finally, it is likely that the New Year celebrations only involve a lot of alcohol and fireworks. It is the beginning of a new year for our calendar. Nothing more, nothing less.

Space reactors

The cooling system of a nuclear reactor with heat pipes can be used during space flight.

A group of researchers from LANL, NASA and NSTec (USA) established the use of heat pipes for cooling a small nuclear reactor that drives the Sterling engine. The system can be used as a dependable energy source for space vehicles.