Paleontology

Researchers have described a previously unknown sauropod dinosaur from fossils found in Argentina's Chubut province. The creature, called Bicharracosaurus dionidei, reached about 20 meters in length and lived around 155 million years ago.

May 12, 2026 Reported by AI

Scientists have determined that structures once seen as traces of tiny animals in 540-million-year-old Brazilian rocks are actually fossilized communities of bacteria and algae. The reexamination uses advanced imaging to reveal preserved cells and organic material.

A newly described crocodile relative from the Late Triassic period began life walking on four legs before adopting a bipedal stance in adulthood, scientists say. The poodle-sized Sonselasuchus cedrus, unearthed in Arizona, reveals unusual growth patterns in ancient reptiles. Researchers detailed the findings in a study published this year.

April 21, 2026 Reported by AI

Small fossils of Liaoningosaurus paradoxus, once thought to represent a miniature species of armored dinosaur, have been confirmed as juveniles, including some less than a year old and a possible hatchling. Researchers analyzed bone growth patterns to reach this conclusion, challenging earlier ideas about the animal's size and lifestyle. The discovery provides insights into early development of ankylosaurs.