Get flash to fully experience Pearltrees
If you brought your iPad 3 home raring to exploit the potential of its fantastic Retina display, you might find yourself without many options. Sure, there are a host of apps that take advantage of the display that Apple claims exceeds the perceptive capacity of the human retina--and naturally the OS itself displays at the full 300 ppi--but these options are hardly flashy. The real magic is ultra-HD video, the likes of which makes that on Blu-ray on your flat screen look like reruns on a Zenith Space Command. Unfortunately, few devices are built to capture images at a resolution better than HD, or 1080p--display tech has outpaced digital imaging tech.
Our planet is a natural source of radio waves at audio frequencies. An online receiver at the Marshall Space Flight Center is playing these songs of Earth so anyone can listen. Listen to this story (requires RealPlayer ) January 19, 2001 -- If humans had radio antennas instead of ears, we would hear a remarkable symphony of strange noises coming from our own planet.