John Leeman
Co-Host of Don't Panic Geocast
John received a B.S. is geophysics and B.S. in meteorology from the University of Oklahoma, then proceeded onto to a PhD in geoscience at Penn State in which he studied slow earthquakes as an experimental rock mechanics researcher. John has worked on gas hydrates experiments at Oak Ridge National Lab as well as worked on telemetry software for NASA JSC. Currently he operates Leeman Geophysical located in Siloam Springs, Arkansas. The company builds custom laboratory equipment as well as educational materials. In his off time John enjoys hiking, brewing beer, restoring antique engines, and flying airplanes.
John Leeman has hosted 108 Episodes.
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Episode 341 - "Scrambler Outside the Physics Department"
September 2nd, 2022 | 40 mins 35 secs
Fake forces! This week we talk about what they are and why you seem to feel them if they are only apparent.
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Episode 340 - "Coriolis Thing"
August 26th, 2022 | 1 hr 3 mins
This week we talk about why the Coriolis force is a fictitious force and what it does to balance pressure gradients in the atmosphere.
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Episode 339 - "Museum with a crater out back"
August 19th, 2022 | 44 mins 26 secs
This week we talk about meteor crater and about the little blue pill.... or red pill.
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Episode 338 - "GEARS 2022"
August 12th, 2022 | 1 hr 1 min
The GEARS workshop just happened again, hear what we saw, what the students did and more!
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Episode 337 - "Air Guitar"
July 22nd, 2022 | 28 mins 56 secs
The summer shorts musical theme continues with sferics and another paper from the BMJ Christmas edition!
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Episode 336 - "Chopstick Breaking Sound"
July 15th, 2022 | 41 mins 18 secs
This week we talk about sounds from the Aurora and strange atmospheric conditions that create it.
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Episode 335 - "Fish with a Ray Gun"
July 1st, 2022 | 26 mins 19 secs
We stick with our musical theme for summer shorts and talk about singing ice! Also why is it important to be stupid as a scientist?
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Episode 334 - "Rock Concert"
June 24th, 2022 | 30 mins 22 secs
Our musical themed summer shorts continue with the phenomena of ringing rocks! Also, can math get you out of that failure to stop ticket?
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Episode 333 - "Sandphony"
June 10th, 2022 | 25 mins 50 secs
This week we talk about singing sands and how on Earth dunes make noise.
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Episode 332 - "Caliche"
June 3rd, 2022 | 26 mins 52 secs
We kick off summer shorts by talking about caliche and ways it makes new field geologists crazy!
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EPISODE 331 - "GUESS AGAIN DUMMY" RYAN MAY
May 20th, 2022 | 1 hr 33 mins
This week Dr. Ryan May joins us to talk about life as a scientific software developer and his career path from radars to radiosondes and more!
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Episode 330 - "Blamo"
May 13th, 2022 | 1 hr 5 mins
Last week we talked about material hardness, but what about when materials crack and fracture? This week we talk about fracture toughness.
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Episode 329 - "Granite Annulus"
May 6th, 2022 | 1 hr 3 mins
What makes a material hard? What makes it tough? Are they the same thing?
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Episode 328 - "Bouma"
April 22nd, 2022 | 56 mins 23 secs
This week we talk about the famous Bouma sequence in more detail and look at where the world of quantum physics could have been in a parallel universe.
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Episode 327 - "Delta Tesseract"
April 15th, 2022 | 50 mins 20 secs
What happens when rivers meet oceans? All kinds of fun sedimentary processes that build deltas. Learn more this week along with a discussion of one man's favorite boulders.
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Episode 326 - "The Pinky Raise"
April 8th, 2022 | 46 mins 12 secs
We talk about conglomerates, how they form, how we classify them, and more. Then we talk about distribution of hook worms in poop.