Stunning Natural Arches, Pandas Taking a Dip, Strang Glowing Clouds
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Arches Shining in the Sun
Arches National Park has more than 2,000 sandstone arches, including the iconic Delicate Arch, that the forces of erosion have shaped over millions of years.
[Full Story: Rock Arches Shine in Stunning Photo]
Long-Fingered Frog Reappears
Called the Bururi long-fingered frog (Cardioglossa cyaneospila), the amphibian is about 1.5 inches (3.8 centimeters) long, with a black and bluish-gray coloration. The males even sport a "ring finger," one extra-long digit on each foot, though scientists aren't sure what it's used for.
David Blackburn of the California Academy of Sciences and Eli Greenbaum of the University of Texas at El Paso spotted the elusive frog during a December 2011 expedition to the Bururi Forest Reserve. It was on their fifth night in the forest that Blackburn heard a frog call; they had hoped it would do so like its closest living relative in Cameroon.
[Full Story: Mysterious Long-Fingered Frog Comes Out of Hiding]
Island Volcano Caught in Action
The commonwealth is an island chain of volcanoes that form the margin between the Pacific Ocean (to the east) and the Philippine Sea (to the west).
[Full Story: Astronaut Spots Steam Flowing from Island Volcano]
Taking the Plunge
[Full Story: Scottish Panda Takes a Dip]
Resident of the Maya Biosphere Reserve
[See the Images: Species of the Maya Biosphere Reserve]
The first Anomalous Transport Rocket Experiment (ATREX) rocket launched at 4:58 a.m. EDT and each subsequent rocket launched 80 seconds apart.
Each of the rockets released a chemical tracer that created milky, white clouds at the edge of space, as seen in a new NASA photo.
[Full Story: Glowing Clouds Created by NASA Rocket Launch]
Shark Twins Worry Researchers
The case of mistaken identity indicates that scalloped hammerhead sharks are even more scarce than once thought, according to some researchers.
Since it's very hard to tell the two species apart only differences in their DNA and number of vertebrae reveal their true identities it's likely that previous assessments of scalloped hammerhead sharks exaggerated their numbers because the counts likely included the look-alike sharks.
[Full Story: Newly Discovered Hammerhead Shark's 'Twin' Sparks Concern]
Rehabilitated Eagle Flies Home
The eagle was found in Amenia, N.Y., by snowmobilers in February 2011. It had suffered multiple puncture wounds on its left leg, likely caused by an animal it was trying to capture. Its left foot was also injured. It was transferred to the Tufts Wildlife Center in North Grafton, Mass., for treatment and made a full recovery.
[Full Story: Rare Golden Eagle Tracked Through Migration]
Deep Sea Dive
[See the Images: Cameron's Dive to Earth's Deepest Spot]
Strange Shape in the Sahara
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.
[Full Story: Mysterious Geologic Structure Seen from Space]
A final measurement of the hailstone, which dropped from the skies on March 9, places it at 4.25 inches long, 2.25 inches tall and 2 inches wide (10.8 by 5.7 by 5 centimeters).
[Full Story: Largest Hailstone Confirmed in Hawaii]