Oh yes, and in the passive case, have a look at this GPS analysis to detect snow depth. http://xenon.colorado.edu/pres...

well yeah, it's been 50 years. With today's technology we can easily go back and fake the landing sites on the moon directly. Since we won the spacerace by faking out the russians.

Ah yes. It's called RADAR, specifically a http://en.wikipedia.org/wiki/S...

Ah yes, HoTMaiL.

More than one extension. One extension per interface revision, and they don't play nicely together and add lag.

no one argues that the concept is impossible, just this implementation. The 3d-doodler is an available ABS extruding pen, just bulkier and with a beefier power supply.

kid at 25, now back in school at 30? Hardly impossible.

and http://www.spacesafetymagazine.com/2013/09/14/european-satellite-goce-uncontrolled-reentry/ his will be the first uncontrolled reentry of an ESA satellite since Isee-2, in 1987. Unfortunately, it will not be the last, considering that the bus-size Envisat’s altitude is gradually decaying in Low-Earth Orbit without control. According to ESA, up to 25% of GOCE’s mass will survive the extreme reentry conditions to fall to the ground. However, the risk for populated areas is very small since the majority of the Earth is covered by oceans. “The major part of what survives to the surface will be the core instrument,” says Dr. Floberghagen. “From the original mass which we have now in space, we have estimated that about 25%, about 250 kilos, will reach the surface, and these 250 kilos will be distributed over between 40 and 50 fragments.” The fragments that survive will hit the ground in a 900 km long footprint. The reentry will be a good test for debris monitoring systems and fragmentation models.

Some, but not all of it. http://www.spaceflight101.com/goce-re-entry.html : With its fins and aerodynamic shape, GOCE will maintain a stable position in orbit as it approaches entry. During entry, the spacecraft will likely remain in that position for the initial phase of re-entry until it breaks up. Following the destruction of the spacecraft, most of its components will harmlessly burn up in the atmosphere. However, it is known that about 20 to 40% of a re-entering satellite's total mass reach Earth's surface. Dense components of satellites usually impact 800 to 1,300 Kilometers downrange from the Orbital Decay Point. Their journey back to Earth is strongly influenced by atmospheric properties like crosswinds that play a major role during atmospheric descent.

You're just assuming he stopped reading after the third line or so, eh?