A giant space rock that wiped out the dinosaurs 66 million years ago may have also handed ants the genetic tools to take over the planet.
Quick Take
- Scientists studied 163 ant genomes covering 12 of 16 living ant subfamilies.
- They found bursts of “jumping genes” in ant ancestors right before the dinosaur-killing asteroid hit.
- Those same ant groups later exploded into thousands of species.
- The study shows a strong link, but does not prove the asteroid directly caused the gene bursts.
New Study Links Ant Genes To Ancient Disaster
Researchers led by Lukas Schrader at the University of Münster compared genomes from 163 ant species. Their study, published in Science Advances, looked back nearly 100 million years into ant history. They were hunting for clues about why some ant groups have thousands of species today while others have very few.
The team found something striking. Several unrelated ant lineages went through bursts of activity from “jumping genes,” known as transposable elements, around the same time. These bursts happened in the early Paleogene period, close to when the asteroid struck Earth about 66 million years ago.
What Are Jumping Genes
Transposable elements are small pieces of DNA that can copy themselves and move to new spots in a genome. Scientists have long known they can shuffle genetic material around. This shuffling sometimes creates new traits or changes how genes turn on and off, which can shape how a species evolves over time.
The study found that ant groups with more of this jumping-gene activity in their genomes also tended to have more species today. Researchers describe this as a clear statistical link between the amount of transposable-element activity and how much a group later diversified.
Timing Lines Up With Mass Extinction
The gene bursts show up in the ancestors of the largest, most successful ant groups alive now. This timing lines up closely with the Cretaceous-Paleogene extinction event, the same disaster that killed off the dinosaurs. Shortly after that period, these ant lineages split into the many thousands of species seen today.
The fact that several separate ant groups show this same pattern at the same time strengthens the case. It suggests something bigger than random chance may have been at work, rather than one lucky species getting a head start.
What The Evidence Does Not Yet Prove
The study shows timing and connection, not direct proof that the asteroid caused the gene bursts. Researchers have not shown an exact chain of events linking the impact’s environmental chaos to active jumping genes inside ant DNA. The gene activity and the extinction event happened close together, but a direct cause has not been confirmed.
The genome sample also leaves out four of the 16 ant subfamilies alive today. That means the pattern, while broad, is not complete. Scientists do not yet know if those missing groups would show the same gene bursts or diversification story.
Part Of A Bigger Scientific Debate
This new genetic evidence joins a long-running debate among scientists about when and why ants became so successful. Earlier fossil research pointed to flowering plants spreading across the planet, while other studies focused on a wave of ant extinctions right before the dinosaur-killing impact. The new genome data adds another piece to that larger puzzle rather than settling it.
Why It Matters
Ants now live on every continent except Antarctica and outnumber most other animals combined. Understanding how they became so widespread helps scientists learn how mass extinctions reshape life on Earth. It also shows how hidden pieces of DNA, invisible without modern genome tools, may have quietly steered the course of evolution for millions of years.
Researchers say the next step is testing whether these jumping-gene bursts changed specific traits that helped ants survive and spread. Until then, the asteroid’s role remains a strong and well-supported lead, not a closed case.
Sources:
sciencedaily.com, newindianexpress.com, earth.com
