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Posts by Shireen Gonzaga

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Science Wire | Apr 30, 2016

Did human limbs evolve from shark gills?

The Sonic Hedgehog gene drives embryonic development of mammal limbs and shark gills. Could our limbs have evolved from gills?

Moon rocks collected b Apollo astronauts have been found to contain an element created only by supernovae. Here, Apollo 12-astronaut Alan Bean takes a sample of the lunar surface. Photo via NASA.
Science Wire | Apr 25, 2016

Moon rocks reveal nearby supernova

Iron-60 found in moon rocks supports an earlier finding that – 2 million years ago – a supernova exploded only 300 light-years away.

The face of a trap-jaw spider, a male, aka Chilarchaea quellon. The long chelicerae are highly maneuverable mouth parts, evolved to rapidly snap prey like a mousetrap. Image via Hannah Wood, Smithsonian.
Science Wire | Apr 15, 2016

Spiders with super-fast mousetrap mouths

In the forests of South America and New Zealand, trap-jaw spiders have mouths clamp down on their quarry like a mousetrap, at lightning speeds.

Science Wire | Mar 30, 2016

Evolution insights from a walking cavefish

Fish evolved into the first land vertebrates 420 million years ago. Clues to that fins-to-limbs transformation may lie in a walking blind cavefish in Thailand.

An artist’s rendition of what the study site at Olduvai Gorge, Tanzania, where human ancestors searched for food and water, may have looked like 1.8 million years ago, Image cedit: M.Lopez-Herrera via The Olduvai Paleoanthropology and Paleoecology Project and Enrique Baquedano.
Science Wire | Mar 20, 2016

Snapshot of early human ancestors’ lives

Scientists used fossil remains and primitive tools to build a vivid description of what life was like for our early human ancestors, 1.8 million years ago.

Image credit: Matt Tillett.
Science Wire | Mar 15, 2016

Hummingbirds’ extraordinary migratory marathons

With fat deposits that almost double their weight, the tiny ruby-throated hummingbird can fly non-stop for more than 1,200 miles (2,000 km) during migration.

A close-up photo of a meteorite sample, 0.59 inches (1.5 centimeters) across showing a ceramic-like refractory inclusion (in pink) embedded in the meteorite. Refractory inclusions are the oldest-known rocks in the solar system (4.5 billion years old). The analysis of the uranium isotope ratios of such inclusions showed that a long-lived curium isotope was present early in the solar system when this inclusion was formed.  Image credit: Origins Lab, University of Chicago.
Science Wire | Mar 09, 2016

Meteorite reveals rare unstable element

A pink meteorite inclusion nicknamed Curious Marie shows that a highly unstable element, curium, was present in the early solar system.

Scanning electron microscope image of a cockroach egg case silicone cast. Image credit: Prof. Hiroki Obata
Science Wire | Mar 01, 2016

Cockroach egg impressions from 4,300 years ago

More information about early human settlements – and in this case the insects who lived alongside them – is being found in ancient bits of broken pottery.

Science Wire | Feb 29, 2016

Simplified calendar and no time zones?

In the Hanke-Henry Permanent Calendar, there are no leap years and Christmas always falls on a Monday. Plus, it’s the same time everywhere on Earth.

Wisdom and her chick, Kukini, February 10, 2016. Image via Midway Atoll National Wildlife Refuge.
Science Wire | Feb 17, 2016

New chick for oldest known wild bird Wisdom

Wisdom, a Laysan albatross, is at least 65 years old. Her latest chick hatched at the Midway Atoll National Wildlife Refuge on February 1.