On Today's Podcast

How Death Metal Singers Make Their Extreme Vocalizations

Vocal researchers are learning how death metal singers safely produce extreme vocal distortions, in hopes of improving vocal health care.

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Most Recent Broadcast

December 26, 2025

Physicist Sean Carroll takes on black holes, Schrödinger’s cat, and other big physics concepts. Plus, we revisit some of our top stories of 2025, covering research into how death metal singers safely produce extreme vocalizations, how algorithms and social media are changing language, and what we can learn from people thriving in the coldest parts of the world.

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From sneak peeks of the show to educational resources to events, stay up to speed with all things SciFri.

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Educational Resource

Microorganisms on the Move

In this activity, students will learn how to prepare deep well slides for observing two types of microorganisms called Paramecium (a group of protozoa, or single-celled organisms, which move with cilia, so they are called “ciliates”) and Euglena (microorganisms which move with flagella, so they are known as “flagellates”).

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Educational Resource

Cool Craniums

In this activity, students will observe three “mystery” mammal skulls and compare and contrast the features of each skull. Students will learn the anatomical terms for skull features such as orbits, nasal passages, and foramen magnum. Students will learn how these features relate to physical characteristics or behaviors of each animal. Students will use their observations and recordings to attempt to identify each skull, and will discuss how these physical characteristics helped the animal survive in its environment.

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