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Hyraxes, which live in Africa and the Middle East, punctuate their songs with snorts. And the snorts appear to reflect the animals&rsquo; emotional state. Jason G. Goldman reports.

These Small Mammals Snort to a Different Tune

Scientists determined that temperatures were 11 degrees cooler during the last ice age&mdash;and that finding has implications for modern-day warming. Julia Rosen reports.&nbsp;

Ice Age Temperatures Help Predict Future Warming

Hummingbirds in the Peruvian Andes enter a state of torpor at night to conserve energy, dipping their body temperature&nbsp;to as low as 38 degrees Fahrenheit. Christopher Intagliata reports.&nbsp;

High-Elevation Hummingbirds Evolved a Temperature Trick

Given an impossible task, a dog will ask a human for help, but a wolf will not seek help&mdash;and neither will a pet pig.

Why Pet Pigs Are More like Wolves Than Dogs

Pumping cheap iron-oxide-rich red bricks with specific vapors that form polymers enables the bricks to become electrical-charge-storage devices.

Bricks Can Be Turned into Batteries

Researchers found that leftovers are likely to end up in the trash, so they advise cooking smaller meals in the first place to avoid food waste. Christopher Intagliata reports.

Leftovers Are a Food-Waste Problem

The finding of a baby dinosaur fossil in the Arctic implies that some dinos nested in the region, which was milder than today but not toasty.

Some Dinosaurs Probably Nested in Arctic

Astronomers observed an odd triple-star system that offers clues about misaligned planetary orbits. Christopher Intagliata reports.

Star Systems Can Be Born Topsy-Turvy

A study estimates that 200 million trees in the tropics are mowed down by lightning annually.

Death by Lightning Is Common for Tropical Trees

Here are some brief reports about science and technology from all over, including one from Antarctica about how there&rsquo;s something funny about penguin poop.

Science Briefs from around the World

Every year, Alaska&rsquo;s big salmon runs feature smaller salmon. Climate change and competition with hatchery-raised salmon may be to blame. Julia Rosen reports.

Alaska's Salmon Are Shrinking

That drought may have brought about societal shifts in the region 5,000 years ago. Christopher Intagliata reports.

End of 'Green Sahara' May Have Spurred a Megadrought in Southeast Asia

The finding could potentially help wildlife managers keep better tabs on their herds. Jason G. Goldman reports.&nbsp;

White Rhinos Eavesdrop to Know Who's Who

Researchers found extra bones within a 240-million-year-old ichthyosaur fossil&mdash;which they determined to be the ichthyosaur&rsquo;s last, possibly fatal meal. Christopher Intagliata reports.

Prehistoric Marine Reptile Died after a Giant Meal

Butterflies, fish and frogs sport rear-end eyespots that reduce predation. Painting eye markings on cows similarly seems to ward off predators.

Cows with Eye Images Keep Predators in Arrears

Hermit warblers in California have developed 35 different song dialects, apparently as a result of wildfires temporarily driving them out of certain areas.

Warbler Species Fires Up Song Diversity

Scientists determined that &ldquo;lava world&rdquo; exoplanets do not derive their brightness from molten rock&nbsp;but possibly get it from reflective&nbsp;metallic clouds. Christopher Intagliata reports.

Why Lava Worlds Shine Brightly (It's Not the Lava)

Climate change is expected to bring more frequent droughts and heat waves to Africa&rsquo;s Kalahari Desert. And aardvarks might not be able to cope. Jason G. Goldman reports.

Aardvarks Are Ailing amid Heat and Drought

Scientists spotted a mouse at the summit of Llullaillaco, a 22,000-foot-tall volcano on the border of Chile and Argentina. Julia Rosen reports.

The World's Highest-Dwelling Mammal Lives atop a Volcano

A decline in smell was the sense loss most strongly associated with such risk in a recent study. Christopher Intagliata reports.

Dampening of the Senses Is Linked to Dementia Risk

Rather than undergoing active chameleonlike color changes, glass frogs&rsquo; translucency allows light to bounce from their background and go through them&mdash;making their apparent color close to their setting. &nbsp;

Translucent Frog Optics Create Camo Color

Compared with traditional lineup techniques, a series of two-faces-at-a-time choices led to more accurate identification by study witnesses.

Paired Comparisons Could Mean Better Witness Identifications

An analysis of fox fossils found evidence that they scavenged from wolf and bear kills until Homo&nbsp;sapiens supplied plenty of horse and reindeer remains.

Foxes Have Dined on Our Leftovers for 30,000 Years

Now submerged caves in the Yucat&aacute;n Peninsula contain remains of ocher-mining operations that date back at least 10,000 years.

Mexico Caves Reveal Ancient Ocher Mining

Soap bubbles are sticky enough to carry a pollen payload and delicate enough to land on flowers without harm.