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  • Researchers analyzed data from over 100 species to place bat origins in Europe rather than Africa or Asia.
  • The findings complicate the debate on whether flight or echolocation evolved first, suggesting both appeared early.
  • This genomic roadmap aims to aid conservation efforts against threats like white-nose syndrome and habitat loss.

A comprehensive genetic study published in Nature has proposed a revised evolutionary history for bats, identifying Europe as the likely birthplace of these unique mammals. The research, which represents the largest analysis of bat genomes to date, challenges long-held assumptions that pointed toward Africa, North America, or Asia as the cradle of bat evolution. By integrating genomic data with fossil records, scientists have constructed a more robust family tree that clarifies how these creatures diversified and spread across the globe over millions of years.

The study involved an international team of more than 130 researchers who examined the complete genetic instructions of 103 species representing all 21 living bat families. In addition to genomic sequencing, the team analyzed physical characteristics across 65 species, including 44 fossil specimens. This extensive dataset allowed scientists to estimate when different lineages diverged and trace the migratory paths bats took after their initial emergence approximately 65 million years ago.

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According to the new evidence, early bats originated in Europe before venturing into Africa. From there, they expanded into Asia, the Americas, and eventually Australia. The ability to fly facilitated this rapid global dispersal, allowing populations to crisscross continents and establish themselves in diverse environments. This biogeographic pattern helps explain why bats are now found on every continent except Antarctica, making them one of the most widespread groups of mammals.

Bats constitute roughly one-fifth of all mammal species, with approximately 1,500 distinct varieties identified today. They rank as the second most diverse group of mammals after rodents and possess several extraordinary biological traits. As the only mammals capable of true flight, they also utilize echolocation to navigate in darkness and exhibit remarkable resistance to diseases that are often fatal to other animals. These unique adaptations have long fascinated scientists, yet their evolutionary origins remained a subject of intense debate until this recent genomic breakthrough.

The study also sheds light on the contentious question of whether flight or echolocation evolved first in bats. A prominent 2008 study had suggested that flight preceded the development of sonar-like navigation. However, the new research, based on a significantly larger dataset, pushes back the timeline for the emergence of echolocation. This finding complicates previous conclusions and suggests that both traits may have evolved near the base of the bat evolutionary tree, though researchers still cannot definitively determine if they appeared simultaneously or in close succession.

This work is part of Bat1K, a global initiative launched in 2017 with the ambitious goal of sequencing and analyzing the genomes of every living bat species. The project aims to provide a foundational understanding of bat biology that can inform future research into their unique adaptations. By establishing a clear genetic framework, scientists hope to uncover the mechanisms behind bats’ exceptional longevity, which is about ten times longer than expected for animals of their size, as well as their ability to carry viruses like Ebola, Nipah, and Marburg without falling ill.

Beyond evolutionary insights, the study has practical implications for conservation efforts. Bats face numerous threats, including habitat destruction, climate change, collisions with wind turbines, and deadly diseases such as white-nose syndrome. This fungal infection, discovered in 2006, has killed millions of bats across North America by infecting hibernating populations. The genomic data may help researchers understand how different species respond to these stressors and identify genetic factors that contribute to resilience or susceptibility.

Understanding bat biology could also yield benefits for human health. Insights into their disease resistance and immune systems may lead to new treatments for zoonotic diseases or even cancer. Conservation experts emphasize that protecting bats is crucial not only because of their ecological importance but also due to the potential medical discoveries they hold. As the Bat1K project continues, it promises to deepen our understanding of these enigmatic creatures and support strategies to preserve them for future generations.

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  • Smithsonian Magazine↗Where Did Bats Originate? Huge Genetic Study May Have Settled the Longstanding Debate and Rewritten the Creatures' Evolutionary Tree