Scientists Shocked by Rapid Speciation After Chicxulub Impact
Scientists find “astounding” evidence of
“ridiculously fast” speciation in a “geologic
heartbeat” after the supposed Chicxulub event.
A Meteoric Blow on Gradualism
by Dr. Sarah Buckland-Reynolds
Popular evolutionary literature often hails the Chicxulub event as a hallmark symbol in the dinosaur extinction story. Although it features rapid catastrophism, the impact site in the southern Yucatan peninsula is often used as a springboard for evolution storytelling on the end of a major portion of the supposed ancient Cretaceous period, or “age of dinosaurs”.
Despite this, new evidence linked to the Chicxulub story has surfaced that startled scientists about just how quickly in geological terms speciation can occur. This is evident in a paper published this year in one of the premier geology journals.
New species evolved within a few thousand years of the Chicxulub Impact (Lowery et al., Geology, 21 January 2026). This paper details emerging evidence that new species “evolved” within a few thousand years of the Chicxulub Impact – a very short timeframe in “geologic time,” challenging long‑standing evolutionary gradualist assumptions.
From a Biblical creationist standpoint, this discovery is another example of how uniformitarianism (the idea that “the present is the key to the past” and that geological and biological processes have always operated at the same slow rates), continues to be undermined by the evidence.
Evolutionary geologists are increasingly being confronted with evidence of rapid change, explosive diversification, and surprising resilience, all of which align more closely with a creationist framework that emphasizes catastrophic events and rapid biological responses.
The microscopic beauty and variety of foraminifera. (Wikimedia Commons)
Smashing Conventional Evolutionary Assumptions
For decades, the conventional evolutionary view has been that speciation is a slow, gradual process, unfolding over millions of years under uniformitarian conditions, or in the specific estimation of the authors “…. on average, ~2 m.y.” (Lowery et al., 2026).
Yet Lowery and co-authors, by examining a microscopic species of planktonic foraminifera, found that this assumed timeline was shrunk by a magnitude of around 1000 times. Instead of forming within two million years, the authors estimated that these new species formed possibly within less than 2,000 years after the catastrophic asteroid’s impact. This is a majorly failed prediction when predicated upon uniformitarian assumptions.
This discrepancy greatly shocked the team of scientists, as they note in the paper that:
“Even highly resolved records of geologically ‘rapid’ speciation show that it can take on the order of 600 k.y.” (Lowery et al., 2026).
Despite the study focusing on an era shaped by the rapid catastrophe of a meteoric impact, such a uniformitarian expectation is rooted in Darwinian gradualism, where small variations accumulate over a vast time span. As the authors explain, in the framework of geologic time, even hundreds of thousands of years are considered “rapid”; but the evidence from this event appeared orders of magnitude faster than this.
How They Found the Surprise of Rapid Speciation
Lowery and colleagues used the interesting method of helium‑3 isotope analysis: an unconventional technique that measures cosmogenic ³He produced by cosmic ray interactions in surface minerals. This approach allowed the researchers to estimate the timeline of environmental exposure following the impact, providing a framework for understanding how quickly new species of forams developed. Instead of tens of thousands of years, they reported the following:
“Based on our new calibration, the first of these new species appeared <2 k.y. after the Chicxulub impact.” …. We found 3He calibrated ages for the lowest occurrence of P. eugubina of between 3.5 (+0.9/-0.6) k.y. and 11.1 (+2.2/-1.6) k.y. after the K/Pg boundary, with an average of 6.4 k.y….”
In a press release from the University of Texas at Austin (21 Jan 2026), echoed March 21 by ScienceDaily, lead author Chris Lowery described the pace as “ridiculously fast”. Co‑author Timothy Bralower attributed this to biological resilience:
“The speed of the recovery demonstrates just how resilient life is, to have complex life reestablished within a geologic heartbeat is truly astounding.”
A Striking Admission and Revision of the Planktonic Foraminifera Story
The discovery of the 2000-6000 year estimation of the post-event development of the planktonic foram was only made possible as Lowery and colleagues acknowledged the limitations of their assumptions. Knowing the conventional accepted timeline of 30,000 years of the first signs of biological recovery from the meteoric impact, they decided to challenge these assumptions. In their words:
“…the long-accepted value, ∼30 k.y. after the boundary, is based on the assumption of constant sedimentation rates across the K/Pg boundary. We provide a new calibration for this important biostratigraphic marker using published records of 3He, a proxy for instantaneous sedimentation rates, from six K/Pg boundary sites. We find Biochron P0 durations between 3.5 k.y. and 11.1 k.y., with an average of 6.4 k.y.”
In their paper, they further explain why they could not build on the assumption of uniform sedimentation rates:
“The essential problem with all the calibrations attempted thus far… is that they assume a constant sedimentation rate between two tie points of known ages. While this is generally a safe assumption in most marine settings in most time intervals, we know for a fact that it is not true immediately after the Chicxulub impact.”
Because sedimentation rates varied dramatically after the extinction, the old uniformitarian assumption collapsed. When this assumption was challenged scientifically, predictions based on uniformitarian assumptions failed by a large margin.
Merit in Exploring Unconventional Clocks: The Helium Connection
Artist conception of the impact that supposedly wiped out the dinosaurs but preserved the forams and butterflies. Image from Wikimedia Commons.
Recognizing the vast errors that would have been produced by resting on assumptions of uniform sedimentation rates, Lowery and co-authors utilized an unconventional method of Helium‑3 isotope analysis. Of note is that, despite the use of a different isotope in the distinct context examining diffusion in zircons, another isotope of Helium (radiogenic ⁴He) has been applied in creation studies, most notably in the Radioactivity and Age of the Earth (RATE) project. Despite differences in isotopic structure and goals, there is an intriguing parallel where the use of underexplored methods may provide fertile ground for the discovery of novel insights that challenge conventional assumptions about long timescales.
When triangulating methods, this case study shows that methods that are sound, albeit unconventional, may expose the fragility of longstanding frameworks. Lowery et a.l’s paper further underscores that dating methods are interpreted through worldview lenses.
Another Case Denting the Coherence of Evolutionary Theory
Lowery et al.’s paper adds to cumulative evidence that speciation can occur in magnitudes more rapidly than predicted by evolutionary timelines. Accumulating evidence within the field, these findings further make the evolutionary claim that new species requiring millions of years is untenable.
Evidence increasingly demonstrates explosive diversification of life, directly contradicting the gradualistic predictions long championed by evolutionists. This pattern aligns far more closely with the creationist model, where organisms were intelligently designed with inherent capacity for rapid variation and adaptation—especially under catastrophic pressures.
In addition to the speed of recovery, the diversity described, where “up to 20 taxa evolved within a few thousand years after the boundary” further undermines the narrative of incremental recovery. Instead, it suggests that life was equipped to rebound quickly, consistent with a creationist view of resilience and design.
Biblical Reflection
From a Biblical creationist perspective, these findings are unsurprising. The Holy Scriptures describe a world created by God, subjected to catastrophic judgment in the Flood, and designed with creatures capable of rapid diversification to fill the earth afterward. The resilience and adaptability of life are not products of blind chance but of divine design.
In contrast, evolutionists continue to be shocked by the tension between their gradualist assumptions and the evidence of “ridiculously fast” diversification. As the authors of our case study decided to do, breaking free from the circular reasoning of evolution requires the use of methods that employ as few faulty assumptions as possible to enable scientific progress, rather than affirming the status quo. Ultimately, these findings open more questions for evolution and cast doubt on Darwinian interpretations, while affirming the Biblical worldview of a created, adaptable, and resilient biosphere.
Dr. Sarah Buckland-Reynolds is a Christian, Jamaican, Environmental Science researcher, and journal associate editor. She holds the degree of Doctor of Philosophy in Geography from the University of the West Indies (UWI), Mona with high commendation, and a postgraduate specialization in Geomatics at the Universidad del Valle, Cali, Colombia. The quality of her research activity in Environmental Science has been recognized by various awards including the 2024 Editor’s Award from the American Meteorological Society for her reviewing service in the Weather, Climate and Society Journal, the 2023 L’Oreal/UNESCO Women in Science Caribbean Award, the 2023 ICETEX International Experts Exchange Award for study in Colombia. and with her PhD research in drought management also being shortlisted in the top 10 globally for the 2023 Allianz Climate Risk Award by Munich Re Insurance, Germany. Motivated by her faith in God and zeal to positively influence society, Dr. Buckland-Reynolds is also the founder and Principal Director of Chosen to G.L.O.W. Ministries, a Jamaican charitable organization which seeks to amplify the Christian voice in the public sphere and equip more youths to know how to defend their faith.