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  • TV Highlights This Week

News Articles: natural selection

An adult mouse is released from the lab into a semi-natural outdoor enclosure. These are its first steps out of an artificial lab environment into a dynamic, realistic ecosystem.

Tagged as: 

  • Science

Survival of the luckiest? New study hints at the potential role of luck in evolution

A new study on mice shows that luck in early life can determine success as an adult, especially when competition is high.

January 08, 2025
|
By:
  • Jonathan Lambert
A post-reproductive toothed whale mother and her son.

Tagged as: 

  • Science

Most animals don't go through menopause. So why do these whales?

Across the animal kingdom, menopause is something of an evolutionary blip. We humans are one of the few animals to experience it. But Sam Ellis, a researcher in animal behavior, argues that this isn't so surprising. "The best way to propagate your genes is to get as many offspring as possible into the next generation," says Ellis. "The best way to do that is almost always to reproduce your whole life."

So how did menopause evolve? The answer may lie in whales. Ellis and his team at the University of Exeter recently published a study in the journal Nature that studies the evolution of menopause in the undersea animals most known for it. What they uncovered may even help explain menopause in humans.

Curious about other animal behavior mysteries? Email us at shortwave@npr.org.

March 22, 2024
|
By:
  • Margaret Cirino,
  • Emily Kwong,
  • and 2 more
A female cockroach considers accepting a sugary offering from a male cockroach.

Tagged as: 

  • Science

These cockroaches tweaked their mating rituals after adapting to pest control

The German cockroach evolved to live only in human environments. This roach is very good at adapting to pest control methods — even if it means changing its mating rituals.

March 31, 2023
|
By:
  • Ari Daniel
A new study finds that orca mothers still feed their adult sons. It's a bond that may come with costs, researchers say.

Tagged as: 

  • Science

Killer whale moms are still supporting their adult sons — and it's costing them

Orca moms spent precious resources feeding their fully grown adult male offspring. A new study finds that this may limit how many more young they produce.

February 09, 2023
|
By:
  • Ari Daniel
A glass is filled in with water on April 27, 2014 in Paris. Scientists studying what makes us thirsty have found the body checks in on our water consumption in several different ways.

Tagged as: 

  • Science

Thirsty? Here's how your brain answers that question

Scientists have shown that the brain uses multiple checkpoints to make sure we get enough water, but not too much.

January 28, 2022
|
By:
  • Jon Hamilton

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