Animals Are Evolving to Survive in the Human World But Often in a Weird Way
Unintentional Evolution: Humanity's Role in Reshaping Animal Life
Discover how routine human activities are unintentionally forcing rapid genetic adaptations across species, fundamentally altering life on Earth. Learn about the Bio Evolutionary Anthropocene Hypothesis and its startling real-world examples.
Short Summary
- Wild animal body sizes generally decrease under human pressure (hunting, habitat fragmentation), contrasting sharply with increasing farm animal size.
- Human impact drives rapid evolution, often causing genetic shifts within decades rather than millennia.
- Unintentional pressures, like infrastructure development or fishing practices, rewire animal bodies and behaviors at a foundational level. This video explores the Bio Evolutionary Anthropocene Hypothesis, detailing how humans have become a hyper keystone species actively guiding evolution outside of intended agricultural or domestic contexts. We examine numerous case studies demonstrating genetic adaptation in fish, mammals, reptiles, and insects due to urbanization, poaching, and resource management.
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Top Comments (10)
Bears in Sweden has doubled the time cubs stay with their mothers in the past ten years due to a rule that hunters can't kill a mama bear that has cubs with her (I read this two years ago I think)
Ah chickens. We keep making them bigger. At some point we'll end up with T-Rex’s again.
In Arizona, many of the rattle snakes no longer make the rattle sound when people are nearby. The noisy ones are the ones people know about and kill, leaving the quiet ones to survive and procreate.
In bigger cities birds evolved not to sing during the day, but during the night. It is due to loud noise from all the cars during the day. They were not able to talk to each other.
reminds me of when i saw a coyote walk in front of me, then carefully look both ways before crossing a huge street in chicago
Canada has identified a large population of wolves in northern British Columbia that are becoming known as; Sea Wolves. Wolves were known to take salmon from rivers during the spawning season on some occasions, possibly following the lead of bears in that environment. This group of wolves is now adapting to a mainly fish diet and actually avoiding small mammals such as rabbits, squirrels, foxes..etc. Beyond the rivers during spawning seasons, the wolves are now entering the ocean to fish. They have been observed diving to considerable depths below the surface to hunt fish of all species and have been recorded swimming up to 9 miles in the ocean. There are indications that they are becoming larger with higher muscle mass. Small mammal populations in the region are now increasing.
There was a moth in England that was originally white, but during the industrial revolution and the release of lots of soot, the moths evolved quickly to dark / black. The white ones stood out against the soot covered buildings, trees, etc. and were easy prey.
I’m from Rio de Janeiro Brasil. Monkeys. They break into your home and help themselves with whatever they need. They find ways to open your windows. That’s something they’ve learned over the years due to people taking more and more of their habitat. People put bars on their windows, so monkeys started sending baby monkeys to pick up stuff instead. They literally wait for people to leave for work before they break in. You can see them hanging on trees patiently waiting.
Kangaroos and wallabies have and are becoming a lot less panicky. They graze at dusk and dawn and road verges are a perfect place to find grass. But these animals would get slaughtered by panicking and running straight under cars. These days they can be seen grazing on the side of the road mostly calm. The panicky ones don't last long.
One of my favorites is that birds are evolving shorter wings so they’re able to maneuver better around vehicles and in urban environments
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Top Comments (10)
Bears in Sweden has doubled the time cubs stay with their mothers in the past ten years due to a rule that hunters can't kill a mama bear that has cubs with her (I read this two years ago I think)
Ah chickens. We keep making them bigger. At some point we'll end up with T-Rex’s again.
In Arizona, many of the rattle snakes no longer make the rattle sound when people are nearby. The noisy ones are the ones people know about and kill, leaving the quiet ones to survive and procreate.
In bigger cities birds evolved not to sing during the day, but during the night. It is due to loud noise from all the cars during the day. They were not able to talk to each other.
reminds me of when i saw a coyote walk in front of me, then carefully look both ways before crossing a huge street in chicago
Canada has identified a large population of wolves in northern British Columbia that are becoming known as; Sea Wolves. Wolves were known to take salmon from rivers during the spawning season on some occasions, possibly following the lead of bears in that environment. This group of wolves is now adapting to a mainly fish diet and actually avoiding small mammals such as rabbits, squirrels, foxes..etc. Beyond the rivers during spawning seasons, the wolves are now entering the ocean to fish. They have been observed diving to considerable depths below the surface to hunt fish of all species and have been recorded swimming up to 9 miles in the ocean. There are indications that they are becoming larger with higher muscle mass. Small mammal populations in the region are now increasing.
There was a moth in England that was originally white, but during the industrial revolution and the release of lots of soot, the moths evolved quickly to dark / black. The white ones stood out against the soot covered buildings, trees, etc. and were easy prey.
I’m from Rio de Janeiro Brasil. Monkeys. They break into your home and help themselves with whatever they need. They find ways to open your windows. That’s something they’ve learned over the years due to people taking more and more of their habitat. People put bars on their windows, so monkeys started sending baby monkeys to pick up stuff instead. They literally wait for people to leave for work before they break in. You can see them hanging on trees patiently waiting.
Kangaroos and wallabies have and are becoming a lot less panicky. They graze at dusk and dawn and road verges are a perfect place to find grass. But these animals would get slaughtered by panicking and running straight under cars. These days they can be seen grazing on the side of the road mostly calm. The panicky ones don't last long.
One of my favorites is that birds are evolving shorter wings so they’re able to maneuver better around vehicles and in urban environments