All articles tagged with #fossil eggs
Tiny micro-fossil eggs from the Korean Cretaceous, Onggwanoolithus aphaedoensis, offer the first direct evidence of bird eggs in Korea and reveal eggshell structure that bridges reptilian and avian forms, shedding light on early reproduction and nesting among ancient birds.
In northwestern China, researchers uncovered more than 200 fossilized eggs from the flying reptile Hamipterus tianshanensis in a single sandstone block, including at least 16 embryos preserved in three dimensions. Dated to about 120 million years ago in the early Cretaceous, the find provides one of the largest pterosaur egg collections and suggests rapid burial by floodwaters aided preservation. CT scans indicate that some embryos lacked fully developed wing structures while the femur was well developed, implying hatchlings might have been flightless; however, researchers caution against over-interpretation. The discovery greatly expands sample size for studying egg and embryo variation and the origins of flight in pterosaurs.
The elephant bird, the largest bird to have ever existed, was a massive, flightless herbivore from Madagascar that weighed over 2,000 pounds and laid enormous eggs. It went extinct around 1000 A.D., likely due to human activity, and now survives only in fossils and legends. Recent genetic studies reveal its close relation to the kiwi, highlighting its unique place in avian evolution.