How hurricanes triggered lizard evolution

Summary of How hurricanes triggered lizard evolution

by NPR

11m•September 8, 2026
Listen to Episode

Overview of How hurricanes triggered lizard evolution (NPR Short Wave)

This NPR Short Wave episode is a science-news roundup covering three studies: how hurricanes may have rapidly shaped lizard evolution in the Caribbean, a new magnetism-based method for authenticating ancient pottery, and a large-data study linking extreme heat to a wider range of health problems than just dehydration or heat stroke. The episode also features host banter and a quiz format with guest Elsa Chang.

Key Stories and Findings

1) Hurricanes may have driven rapid lizard evolution

  • Researchers studied Silver Key anoles on Caribbean islands hit by Hurricanes Irma and Maria.
  • After the storms, surviving lizards appeared to have shorter fourth toes on their hind feet.
  • Scientists believe the shorter toes helped the lizards grip branches better during extreme winds, giving them a survival advantage.
  • In wind tests, lizards with shorter toes were able to cling on about 30 seconds longer than those with longer toes.
  • The study identified a specific gene linked to shorter toes, suggesting that hurricane-force winds may have shaped the genetics of later generations.
  • The work was published in Current Biology.

2) A new way to test whether ancient pottery is real

  • The episode explores how archaeologists and museums deal with forged clay artifacts.
  • The new method uses magnetism preserved in clay:
    • When clay is fired, iron-bearing minerals align with Earth’s magnetic field.
    • This creates a magnetic record that can help indicate whether an object is truly ancient.
  • Researchers found that in older artifacts, it takes more heat to erase a secondary magnetic signal than in newer objects.
  • If that signal resists erasure above 112°C, the object is likely more than 1,000 years old.
  • The method was published in PNAS and could help museums and investigators verify authenticity, though it requires specialized equipment.

3) Extreme heat is linked to more health problems than expected

  • Researchers in Chicago analyzed nearly 1 million ER and urgent care visits over 12 years.
  • They looked for conditions that increased during periods of extreme heat.
  • In addition to expected problems like dehydration and heat stroke, hot days were associated with:
    • Kidney failure
    • Skin rashes
    • Swelling
    • Mental and behavioral disorders
    • Assault
    • Traffic accidents
  • The researchers stressed that these are associations, not proof of causation.
  • The findings were published in Science Advances.

Main Takeaways

  • Rapid evolution can happen quickly when environmental pressure is strong enough, as seen in the hurricane-surviving lizards.
  • Magnetism offers a promising new tool for authenticating clay artifacts and spotting fakes.
  • Extreme heat affects public health broadly, with impacts that go beyond classic heat-related illness.
  • The episode reinforces a key theme: environmental conditions can reshape biology, history, and human health in surprising ways.

Notable Insight

  • The episode emphasizes that humidity matters in heat illness because sweat must evaporate to cool the body; high humidity makes that harder, increasing the risk of overheating.

Extra Note

  • The hosts also point listeners to NPR’s project on undercounted heat-related deaths and encourage checking local county data on the NPR website.