An artist's rendering of the 70-million-year-old fish Bonnerichthys. This large bony fish got its dinner much like today's whales, by slurping in water and filtering out tiny sea creatures. Image courtesy of Robert Nicholls, www.paleocreations.com hide caption

itoggle caption Image courtesy of Robert Nicholls, www.paleocreations.com

The golden mask of Tutankhamen is displayed at the Egyptian Museum in Cairo. New research suggests that the famous pharaoh suffered from numerous ailments, and probably spent much of his life in pain before dying at 19 from the combined effects of malaria and a broken leg. Amr Nabil/AP hide caption

itoggle caption Amr Nabil/AP

Taken in 1990 by NASA's Voyager 1 spacecraft, the "pale blue dot" photo shows what our planet looks like from 4 billion miles away. Earth is the tiny speck of light indicated by the arrow and enlarged in the upper left-hand corner. The pale streak over Earth is an artifact of sunlight scattering in the camera's optics. NASA/JPL hide caption

itoggle caption NASA/JPL

The 12-inch gold-plated records contain greetings in 59 languages, samples of music from different cultures and eras, and natural and human-made sounds from Earth. One record is currently 16.89 billion km from Earth, the other is over 13 billion km away. NASA Center: Jet Propulsion Laboratory hide caption

itoggle caption NASA Center: Jet Propulsion Laboratory

Coronal loops, seen here, are fountains of multimillion-degree gas in the atmosphere of the sun. They are often precursors to solar flares, which emit strong bursts of electromagnetic energy. NASA/AP hide caption

itoggle caption NASA/AP

The bdelloid rotifer Philodina gregaria. Bdelloid rotifers are tiny invertebrates that reproduce asexually. Courtesy of Micrographia hide caption

itoggle caption Courtesy of Micrographia

An artist's rendition of two Sinosauropteryx dinosaurs, showing their short, bristle-like feathers along the midline of the head, neck, back and around the tail, forming irregular stripes. Chuang Zhao and Lida Xing hide caption

itoggle caption Chuang Zhao and Lida Xing