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South America

Researchers revealed that differences in sloth habitats drove the wide variation in size seen in extinct species.

Giant Sloths the Size of Elephants Once Walked Along the Ground. Here’s How the Massive Animals Evolved and Declined

Researchers analyzed fossils and DNA to get a big-picture view of sloth evolution and determine what drove their immense size variation

Researchers have used genomic sequencing to trace what they’re calling the “longest migration out of Africa.”

New Research

Scientists Use DNA to Trace Early Humans’ Footsteps From Asia to South America

Over thousands of years, humans from Eurasia trekked more than 12,400 miles to eventually reach the southernmost tip of South America, a new genetic investigation suggests

Notebooks decorated with swastikas were among the documents found in the wooden crates.

Boxes Full of Nazi Propaganda Discovered in the Basement of Argentina’s Supreme Court

Workers found crates packed with swastika-covered notebooks, postcards and photographs while preparing to move the court’s archives to a new museum

The Blomberg’s tree boa was recently documented in southwestern Colombia for the first time, even as it loses habitat in the nearby rainforests of Ecuador.

This Elusive Snake’s Habitat Is Under Threat in Ecuador. Here’s How Conservationists Are Fighting Back

How do you protect an endangered serpent with a special talent for hiding in plain sight?

An artistic rendering of the stone chamber where the tubes were discovered

Cool Finds

Archaeologists Say They’ve Discovered a Hidden Chamber Where Elites Used Hallucinogens 2,500 Years Ago

Unearthed in Peru, the small underground room may have been used for rituals involving psychoactive drugs. New research suggests these “exclusive” events were reserved for the elite

Their Royal Highnesses on North Seymour Island, Richard Foster, 2009

Official Paintings From Charles III’s World Tours Are Going on Public Display for the First Time

Over 40 years, artists have accompanied Charles on his travels to 95 countries with only one directive: Paint whatever interests them

Crocodile-like sebecids were known to roam South America after dinosaurs went extinct. Recently found fossils suggest they inhabited the Caribbean as well—and thrived there long after they disappeared on the continent.

Fossils Reveal Enormous, Crocodile-Like Reptiles Survived for Millions of Years Longer Than Previously Thought

New discoveries in the Dominican Republic suggest sebecids roamed the Caribbean as recently as 4.5 million years ago, long after they vanished from South America

The burial was discovered in the remains of a building in an ancient fishing town.

Cool Finds

This Ancient High-Status Woman Was Buried With a Parrot-Feather Cape and a Beaded Toucan’s Beak in Modern-Day Peru

The burial belongs to the ancient Caral culture, the oldest civilization in the Americas

The 113-million-year-old fossil of Vulcanidris cratensis is the first known hell ant preserved in rock rather than amber.

Scientists Discover the Oldest Known Ant Fossil, a 113-Million-Year-Old ‘Hell Ant’ Preserved in Rock in Brazil

The odd-looking specimen with scythe-like jaws indicates that early ants were spread widely across the globe while dinosaurs still roamed

The burials were filled with rich grave goods like pottery and corn cobs.

Archaeologists in Peru Discover Graves of Men, Women and Children Killed in Battle, Then Buried With Honor

The 24 members of the mysterious Chuquibamba culture were interred with valuable grave goods

A man attacked the stone with a metal object.

Man Vandalizes Famed 12-Angled Stone, an Inca Engineering Marvel in Peru

The stone, which sustained damage in six spots, had been carved to fit perfectly in a palace wall hundreds of years ago

The Punta Medanosa colony of Magellanic penguins on the coast of Argentina has nearly 8,000 breeding pairs. Other colonies number in the hundreds of thousands.

What Did Scientists Learn After Thousands of Penguins Were Slaughtered by Mountain Lions?

The thriving bird colonies likely grew over several decades because local shepherds had temporarily eliminated pumas

Spanish settlers knocked down all but the foundations of the Temple of the Sun, then built a church atop the Inca walls.

New Research

Researchers Have Found an Inca Tunnel Beneath the Peruvian City of Cusco

The dug-out passages may follow the exact path of the Inca capital’s aboveground roads

The finished national anthem included the calls of 41 birds.

How Scientists and Composers Teamed Up to Create a Stunning Natural Version of Colombia’s National Anthem

A team trekked for two weeks and collected the sounds of birds, frogs, a jaguar and whales in order to make the song

A baby pygmy marmoset, under the care of an older member of its cooperative family group, perches on a bough in a gallery forest on the banks of the Aguarico River in eastern Ecuador.

They’re Adorable. And Endangered. Meet the World’s Smallest Monkey: the Pygmy Marmoset

The cute creatures are chatty, family oriented—and facing a shrinking habitat in the remote forests of Ecuador

The Amazon tree boa (Corallus hortulana) is not a new species, but it's one of the reptiles documented on a 2022 expedition to the Alto Mayo region of Peru.

Expedition Discovers 27 New Species in Peru, From an ‘Exceedingly Rare’ Amphibious Mouse to a Blob-Headed Fish

The hidden creatures were found in a densely populated region known for its successful—and controversial—conservation tactics

Photographs of “disappeared” Argentines inside a courtoom in September 2024, during one of 17 ongoing trials of former junta officials.

Four Decades After the Fall of Argentina’s Dictatorship, a Fight Over the Country’s Darkest Chapter Is Reopening Grievous Wounds

Inside the fight to memorialize victims of the military junta that ruled over the South American nation in the 1970s and ‘80s

In Ecuador, a glass frog from a new species identified in 2022, Hyalinobatrachium nouns, hangs from the underside of a leaf, seen from below.

The Andes’ Translucent Glass Frogs Need to Be Seen to Be Saved

The amphibians are at the mercy of mining operations that are destroying their ecosystems, but local communities throughout South America are fighting back

This fragment of a terror bird’s left tibiotarsus, a lower leg bone in birds equivalent to that of a human tibia or shin bone, dates to around 12 million years ago during the Miocene epoch.

New Research

Rare ‘Terror Bird’ Fossil Found in Colombia Reveals the Enormous Size of a Prehistoric Predator

The bone, described two decades after its discovery, suggests the species might have grown up to 20 percent bigger than other terror birds

Silesaurids—including Silesaurus opolensis (pictured above) and the newly described fossil from Brazil (not pictured)—are usually considered non-dinosaurs. Some researchers are suggesting they might be more closely related to certain dinosaurs than previously thought.

A Rare Triassic Fossil Found in Brazil Could Shed Light on the Origin of Dinosaurs

The 237-million-year-old remains are among the oldest silesaurid fossils ever found, adding to paleontologists’ understanding of this still-mysterious group of prehistoric reptiles

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