Hawaiian crows, or ʻalalā, are intelligent birds that play an important role in Hawaiian culture. (This is not one of the five individuals taking part in the pilot release on Maui.)

Scientists Release Five Hawaiian Crows on Maui, Giving the Imperiled Birds a Second Chance—on a New Island

Only about 110 individuals of the species, called ʻalalā, are left in the world, making them the most endangered crows on Earth

Gus did not hesitate to belly flop into the ocean.

Gus, the Young Emperor Penguin Who Made a Surprise Appearance in Australia, Is Now Heading Home

Wildlife caretakers released the bird into the Southern Ocean after he'd put on some weight and regained his strength

Makenzie Van Eyk (second from right) holds the message in a bottle that she wrote 26 years ago. Roland St. Pierre (far left) was her teacher at the time. Her daughter Scarlet (second from left) and son Huxley (far right) are enrolled in the same school she attended.

A Little Girl Dropped a Message in a Bottle Into a Lake. Her Daughter's Classmate Found It 26 Years Later

Makenzie Van Eyk wrote the letter as part of a class project in 1998, when she was in fourth grade. Recently, the note was discovered by a boy who goes to school with her daughter—who is now in fourth grade herself

This adult Partula tohiveana snail doesn't have a dot of UV-reflective paint on its shell, meaning it was born in the wild.

These Tiny Snails Are Breeding in the Wild for the First Time in 40 Years in French Polynesia

During a release of captive-bred snails in September, researchers discovered wild-born individuals from the Partula tohiveana species—which had been considered extinct in the wild—marking a huge milestone in a global effort to save them

An inside spread in the newspaper featured photos of some of the victims, including the Titanic's captain Edward J. Smith.

After the Titanic Sank, Families and Friends of People on the Ship Anxiously Waited to See Who Survived and Who Perished

A newspaper detailing the accounts of loved ones, published on April 20, 1912, was recently discovered in a wardrobe and sold at auction

A California condor chick rests in a clear container lined with paper at the L.A. Zoo.

A Record-Breaking 17 California Condor Chicks Hatched at the L.A. Zoo This Year

The successful breeding season offers more hope for the endangered species, which has come back from the brink of extinction due to captive breeding efforts

An endangered Przewalski's horse is released into the Altyn Dala "Golden Steppe" in central Kazakhstan.

Endangered Wild Horses Return to Kazakhstan for the First Time in at Least 200 Years

The international effort, led by the Prague Zoo, released seven Przewalski’s horses to their native steppe habitat in central Asia

160 pilot whales, mainly adult females with several young calves, stranded themsleves in shallow waters on Thursday morning in Western Australia.

Rescuers Save 130 Beached Pilot Whales in Western Australia After Mass Stranding

An additional 29 whales died, officials reported last week, while the reason behind the stranding remains unknown

The Capital Kiwi Project members discovered two kiwi chicks late last month.

Wild Kiwis Born Near New Zealand's Capital for the First Time in More Than 150 Years

Conservationists discovered two brown kiwi chicks one year after the birds were reintroduced in a Wellington suburb

North Atlantic right whales face threats of entanglement in fishing gear and injuries caused by ships.

North Atlantic Right Whale Numbers May Be Stabilizing at Last

After a decade of decline, the latest population estimate is good news—but conservationists say we "have a long ways to go" to safeguard the marine mammals