Tiny Dinosaur Discovery: 1kg 'Alnashetri' Found in Argentina Challenges Evolution Theories

• A new dinosaur, 'Alnashetri cerropoliciensis', weighing just 1 kilogram and the size of a large cockatoo, was discovered in Argentina's Patagonia region.
• This is the smallest non-avian dinosaur found in South America, challenging previous theories about dinosaur size and evolution.
• Found in rocks approximately 90 million years old, the discovery site also yielded skeletons of the world's largest predatory and herbivorous dinosaurs.
• Alnashetri belongs to the 'Alvarezsauroid' group, previously thought to be limited to Asia and South America, prompting re-examination of older specimens.
• Scientists suggest small size evolved multiple times in Alvarezsauroids, indicating adaptation to different circumstances rather than solely diet or environment.