MNN : earth-matters (24)

Rare California frogs of Mark Twain fame may be making a comeback

The California red-legged frog, made famous by Mark Twain's 'The Celebrated Jumping Frog of Calaveras County,' is breeding again in the Santa Monica Mountains.

World's largest dinosaur footprint shows just how enormous these beasts were

The track, which could have squashed a man like a bug, was left by some kind of giant sauropod.

Tasmanian tiger 'sightings' prompt new scientific hunt

Following fresh eyewitness evidence, researchers are placing dozens of camera traps in a remote region of Australia.

Rare Florida panther kittens spotted outside known breeding range

Florida panthers have apparently expanded their range, which could be a huge boost for the endangered cats.

In baby otter's first try, water is no fun

This squeaky baby otter went into the water for the first time, and it didn't seem like a fan.

12 amazing images of Jupiter

Jupiter is the largest planet in our solar system and fifth from the sun. Thanks to several missions by NASA, we're able to it as never before.

Take a flight through the aurora australis

Passengers aboard an Air New Zealand flight got up close and personal with the southern lights.

650-year-old Polish oak is Tree of the Year

The towering Oak Józef tree beat out a selection of gnarled candidates from 16 European countries.

Say hello to the 11 new cloud atlas inductees

Roll clouds and contrails are among the11 clouds now recognized by the World Meteorological Organization in the International Cloud Atlas.

New breeding area in Bolivia offers hope for wild macaws on the brink

An expedition uncovered important habitat — and potential protections — for critically endangered blue-throated macaws

9 famous mirages that play tricks on the eyes

The subject of legends, mirages are nature's version of optical illusions.Here's a look at how, why and where they occur.

How you can help bluebirds bounce back

Bluebird populations are rising after a decline in 20th century, and helping out involves creating spaces for them to thrive.

Where are Earth's largest nature reserves?

America's national parks are enormous, but they pale in comparison to the most massive nature reserves around the world.

3 reasons to stare at the clouds on World Meteorological Day

The theme for this year's celebration of weather is 'Understanding Clouds' — and there's a lot to know.

Cicadapocalypse: What you need to know

After a 17-year absence, Brood VI of these bizarre insects will overrun parts of the U.S. in coming months.

5 venomous animals that could save your life

These dangerous critters could hold the secret to curing cancer and other diseases.

Turn your binoculars to the night sky for the Beehive Cluster

This unusual Beehive Cluster of stars will mesmerize you!

Thousands of bulging methane bubbles could explode in Siberia

Scientists estimate more than 7,000 dangerous methane 'bumps' have formed in Siberia's Yamal and Gydan peninsulas over the last couple of years.

Popeye the Foodie Dog eats better than you

You'll want to sit at the table with this adorable rescue dog who Instagrams his meals at pet-friendly restaurants.

Bumblebee gets a helping hand from Endangered Species Act

The beleaguered rusty patched bumblebee is the first bee species in the Lower 48 states to be listed as endangered by the U.S. Fish and Wildlife Service.

How climate change is stripping the Caribbean of its prized coral reefs

Climate change is impacting the Caribbean's coral reefs, but it's also affecting land mass and languages.

Chocolate companies put their heads together to save trees

Twelve of the world's leading chocolate producers, with some help from Prince Charles, intend to tackle deforestation.

The easy way to tell the difference between seals and sea lions

There are two quick tricks to tell which type of pinniped, seal or sea lion, you're looking at.

Tiny origami robots are flexible space rovers

The Pop-Up Flat Folding Explorer Robot could explore terrain too rough for human explorers.