1. Clever and charming, these photos playing with scale http://bit.ly/fJfA8z
2. A mock mission to Mars, for real http://bit.ly/fiK6dT
3. Gold swimming pool in Tibet http://bit.ly/edeWmw
4. An electric mollusk http://bit.ly/gbCffc
5. Color photos of ill-fated 1915 artic voyage http://bit.ly/fd76Xc