For years, scientists believed flowering plants truly took over only after the dinosaurs disappeared. A stunning fossil discovery in New Mexico is now turning that idea on its head. Hundreds of beautifully preserved fossil fruits and seeds show that flowering plants had already become rich, diverse, and successful almost 75 million years ago.
The fossils date back around 74.6 million years, nearly 10 million years before the asteroid impact that ended the age of non-avian dinosaurs. Published in Science on June 26, 2026, the research suggests that flowering plants were already shaping ancient forests while dinosaurs still ruled the landscape. The discovery adds an exciting new chapter to Earth’s evolutionary story.
The ‘Frozen’ Forest From the Age of Dinosaurs
That blanket of ash sealed delicate fruits, seeds, and plant structures before they could decay. Such remarkable preservation is extremely rare, especially for soft plant material that normally disappears long before fossilization begins.
Researchers collected fossils from the site over several decades, from 1992 to 2016. They recovered roughly 450 fossilized fruits and seeds representing nearly 80 different plant types. Some carried wings that allowed them to ride the wind, while many others formed fleshy fruits that were likely eaten by animals. The largest fossils were about the size of a small date. This shows that these ancient plants were already producing substantial fruits.
This collection offers something scientists rarely get to see. Instead of scattered pieces from different places and time periods, the fossils capture an entire living ecosystem. That makes it much easier to understand how these plants grew together and interacted with the animals around them.
Flowering Plants Were Already Thriving
For decades, many researchers thought flowering plants remained uncommon until after the asteroid strike about 66 million years ago. According to that idea, mammals spread seeds after dinosaurs vanished, allowing flowering plants to quickly dominate forests during the following millions of years.
The New Mexico fossils tell a very different story. Scientists reconstructed a mature forest where flowering plants filled much of the understory. They were not rare visitors. They were already important members of the ecosystem and had developed many successful strategies for reproduction and spread.
The fossil fruits display an impressive variety. Some relied on wind to carry their seeds across the landscape. Others produced fleshy coverings that attracted hungry animals seeking food. Having several strategies at once gave flowering plants a better chance of expanding into new areas.
Researchers also found many fruits clustered together in ways that resemble modern bunches of grapes or groups of nuts. These clusters suggest flowering plants were growing in large numbers rather than appearing only once in a while. Their abundance suggests forests that were already evolving into ecosystems much like those we recognize today.
Dinosaurs May Have Helped Spread Ancient Fruits
Scientists believe animals most likely carried these seeds across the forest after eating the fruits.
During the Late Cretaceous Period, those animals included early mammals as well as several plant-eating dinosaurs. Although direct fossil proof of fruit eating remains limited, the shape and size of many fossils strongly suggest they evolved to attract animals capable of moving their seeds.
Researchers believe small mammals probably fed on many of the fruits, but they were not the only candidates. Certain dinosaurs may also have eaten these ancient fruits before dropping the seeds elsewhere. If that happened, dinosaurs helped flowering plants spread across forests long before mammals became the dominant land animals.
Flowering plants make up about 90% of all living plant species today. Nearly every major fruit, vegetable, grain, and flowering tree belongs to this enormous group. Understanding when they became successful helps scientists explain how modern ecosystems developed.
The fossil site also sheds light on one of biology’s oldest mysteries. Charles Darwin once called the rapid appearance of flowering plants in the fossil record an “abominable mystery.”