Dutch astronaut Andre Kuipers snapped this hypnotic image of the so-called Richat structure in Mauritania, as the space station flew over the Sahara Desert on the Atlantic Coast of West Africa. Erosion of the various rock layers created the ring-like features that make up the sprawling structure, but the origin of the Richat structure remains somewhat mysterious, geologists have said.

The tan-brown animal with greenish patches was strange enough, but what really baffled beachgoers was its massive size and the dinosaur-like bony plates on its sides. It's not clear just how long it was, but photos suggest it exceeded 10 feet.  Like many washed-up carcasses it carried both a salty stench and an air of mystery. Speculation ran rampant, with commenters suggesting that the creature was everything from a dinosaurian sea monster to a toxin-spawned mutation to a chupacabra.  Scientists, however, were somewhat more skeptical. 

The Competitive Enterprise Institute plans to commemorate Earth Hour 2012 with its "Human Achievement Hour," 60 minutes to gather with friends in a heated home, watch television and surf the Internet instead of dimming or shutting off the lights altogether to draw attention to climate change.

"HAH is an annual event meant to recognize and celebrate the fact that this is the greatest time to be alive, and that the reason we have come is that people have been free to use their minds and the resources in their environment to experiment, create, and innovate," reads a CEI website on the event scheduled to coincide with Earth Hour 2012 from 8:30 to 9:30 p.m. local time Saturday.

"This incredible image gives us a new perspective of our galaxy, and illustrates the far-reaching discoveries we can make from large sky surveys," Nick Cross, of the University of Edinburgh, said in a statement. "Having data processed, archived and published by dedicated teams leaves other scientists free to concentrate on using the data, and is a very cost-effective way to do astronomy."