Natural Selections

(May 27, 2021) A coral reef is kind of like Manhattan, a huge number of mouths to feed in a packed parcel of real estate. A reef doesn't have upstate farms to keep them all fed. So how do they get by?

(May 20, 2021)

(May 13, 2021) Few creatures move with more grace than deer. Martha Foley compares them to ballerinas. Curt Stager says there's a reason for that. As ballerinas often do, deer walk on their tip-toes.

(May 6, 2021)

(Apr 29, 2021)

(Apr 22, 2021)

(Apr 15, 2021) Curt Stager has his students start the semester by picking out a "pet rock." At the end of term, they have to tell the story of that rock - what it is, what it's made of, and what happened to shape it it over the ages.

(Apr 8, 2021)

(Apr 1, 2021)

(Mar 25, 2021)

(Mar 18, 2021) You can get the sugar out of a lot of trees, but there's something special about the sugar maple. Its trunk is highly efficient at storing and moving sap. That's in part because the sap is stored throughout the trunk, rather then down in the roots, as with most trees in winter. Martha Foley and Curt Stager look at that other "sweet science," the one behind our favorite breakfast condiment.

(Mar 11, 2021)

(Mar 4, 2021) Martha Foley and Dr. Curt Stager discuss cosmic rays. While many people may think cosmic rays only affect astronauts or satellites - objects in space - computers and other electronic equipment on Earth can be affected, too.

(Feb 25, 2021)

(Feb 18, 2021)

(Feb 11, 2021) In general, plants make food from sunlight, and animals fuel themselves by "burning" oxygen. But some animals think outside the box. Curt Stager and Martha Foley look at a photosynthetic slug that hijacks the genetic machinery of the algae in its diet, and at a jellyfish that needs no oxygen, burning the alternative fuels of hydrogen and sulfur.

(Feb 4, 2021) "In the case of the voles and the shrews, they'll actually shrink their total body mass down, so there's less body to have to be fed."

(Jan 28, 2021) It's the reason opposites attract and doorknobs shock, why lightning strikes, and the way bumblebees find the sweet spot in flowers. Whenever an object has more or fewer electrons than its neighbor, there is the potential for static discharge. Martha Foley and Dr. Curt Stager talk about the mysterious and hair-raising ways of static electricity.

(Jan 21, 2021) What is a flame? Why is it shaped like that? How does it keep going? Martha Foley and Dr. Curt Stager answer some burning questions about rapid oxidation.

(Jan 14, 2021) Dr. Curt Stager tries once again to answer the classic child's question. It is a poser that was worthy of Einstein's time, who eventually came up with the best answer. But it's complicated. And when the sky isn't blue, why not? What's up with that? Martha Foley wants to know.