Please Explain

A weekly feature on The Leonard Lopate Show; airs every Friday at noon

In Please Explain, we set aside time every Friday afternoon to get to the bottom of one complex issue. Ever wonder how New York City's water system works? Or how the US became so polarized politically? We'll back up and review the basic facts and principles of complicated issues across a broad range of topics — history, politics, science, you name it.

Recently in Please Explain

Please Explain: Steroids and Human Growth Hormones

Friday, February 15, 2008

Roger Clemens's Congressional testimony has put pro athletes' steroid use on center stage. On Please Explain, find out what exactly steroids and human growth hormones are, how they affect the body, and why they can be so dangerous.

Leonard speaks with Dr. Timothy Hewett of The Sports Medicine Biodynamics Center ...

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Please Explain: Science of Love

Friday, February 08, 2008

Just in time for Valentine’s Day, Please Explain is all about the science of love.

Rutgers anthropologist Dr. Helen Fisher is author of Anatomy of Love: A Natural History of Mating, Marriage, and Why We Stray and Why We Love: The Nature and Chemistry of Romantic Love. University ...

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Please Explain: Mormons and the Church of LDS

Friday, February 01, 2008

The Church of Jesus Christ of Latter Day Saints (aka Mormonism) is the fastest-growing religion in the world. On Please Explain, find out about the basic tenants of the Mormon faith...and how the church's history has influenced its culture. Also: how the recent death of church president Gordon B. Hinckley ...

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Please Explain: Stock Markets

Friday, January 25, 2008

Stock markets around the world seem to be going haywire in recent weeks. We find out how global stock markets work, and why they’re so interconnected. John Authers is the Investment Editor for the Financial Times; David Weidner is Senior Columnist for Marketwatch.

Weigh in: Do ...

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Please Explain: Delegates

Friday, January 18, 2008

This year’s batch of presidential hopefuls are fighting over delegates as much as they’re fighting over voters. On Please Explain, find out who the delegates are, how the system works, and what superdelegates are.

Stephen Wayne is Professor of Government at Georgetown University and author of The Road to ...

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Please Explain: The History of Money

Friday, January 11, 2008

The first coins were invented in the seventh century BC! Please Explain looks into the history of money...from the earliest lumps of metal, to modern-day virtual money. Numismatist Douglas Mudd is the curator of The American Numismatic Association's Money Museum and author of All the Money in the World.

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Please Explain: Anger and Aggression

Friday, January 04, 2008

What actually is anger? And what does it do to you and to others? On this week’s Please Explain, Dr. William Gerin, of the Behavorial Cardiovascular Health and Hypertension Program at Columbia Universtiy School of Medicine, and Dr. Emil F. Coccaro, Chairman of the Department of Psychiatry at the University ...

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Please Explain: Champagne and Other Sparkling Wines

Friday, December 28, 2007

What makes champagne different from other sparkling wines? Find out how the good stuff is made, and how to get the best sparkling wine at the price you can afford. Michael Aaron is the chairman of Sherry-Lehmann, the 73 year-old Park Avenue wine and spirits shop. Karen Page is co-author ...

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Please Explain: Snow

Friday, December 21, 2007

We find out about the physics and chemistry of snow and what conditions we’ll need to have it with Dr. Kenneth Libbrecht, a professor of Physics at Caltech.

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Please Explain: The Science of Consciousness

Friday, December 14, 2007

When you see a blue flower, do you see the same blue flower that I do? When you feel cold is it the same sensation I feel? On Please Explain we look at the biology of consciousness...and what brain science reveals about who we are and how we experience the ...

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Please Explain: Oil Spills

Friday, November 30, 2007

58,000 gallons of oil were recently spilled in the San Francisco Bay…and much of it will never be cleaned up. On today’s Please Explain: how oil spills harm the environment, and why they’re so hard to clean up.

Christopher M. Reddy is a scientist with the Woods Hole Oceanographic Institution. ...

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Please Explain: Laughter

Friday, November 16, 2007

Research shows that the average adult laughs six to eight times a day... whereas the average child laughs around four hundred times each day. Today’s Please Explain is all about laughter. Dr. Robert Provine of the Neuroscience Program at the University of Maryland Baltimore County is author of the book ...

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Please Explain: Insomnia

Friday, November 09, 2007

Can’t sleep? Find out why on today’s Please Explain…and whether there’s anything you can do about it, from drinking warm milk to popping sleeping pills. Dr. Ana Krieger is the Director of the NYU Sleep Disorders Center. Dr. Carl Bazil is Director of Neurological Division at the Columbia University Comprehensive ...

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Please Explain: The Human Heart

Friday, October 19, 2007

Our hearts beat about 100,000 times every day, pumping our blood nearly 12,000 miles: the equivalent of crossing the U.S. from coast to coast four times. Today we'll find out how our most vital organ works, why it sometimes fails, and what we can do to keep it healthy. Send ...

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Please Explain: Acupuncture

Friday, October 12, 2007

Most experts agree that acupuncture is safe, but does it work? And what is the circulation of Qi, the meridian system, and the five phases theory? Find out all about acupuncture on today's Please Explain. Leonard is joined by Dr. Richard Hammerschlag, Neurobiologist and Dean of Research at the Oregon ...

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Please Explain: Apples

Friday, October 05, 2007

We'll get straight to the core of autumn's favorite fruit on today's Please Explain. Send your questions on all things apple-related to Steve Clarke of Prospect Hill Orchards and Dorothy Hinshaw Patent, author of A is for Apple, Apple Trees, and An Apple a Day.

Call us at ...

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Please Explain: Over-the-Counter Painkillers

Friday, September 07, 2007

Americans spend more than $2 billion annually on non-prescription pain relievers. Today we'll find out what they are, how they work, how they differ from one another and from prescription drugs, what side effects they cause, and more. Rear Admiral Sandra Kweder, MD, deputy director of the Food and Drug ...

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Please Explain: Hair

Friday, August 10, 2007

Find out why we have hair, if blondes have more fun, how shampoo and conditioner actually work, and more when Assistant Professor of Clinical Dermatology Dr. Michele Hanjani and anthropologist Dr. Peter Frost give us the long and short of hair, from head to toe.

Call us live on the ...

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Please Explain: Birth Control

Friday, July 13, 2007

The earliest known female contraceptive device dates back to 1850 BC, when pessaries made of crocodile dung, honey, and sodium carbonate may have been the best option available to women. Chemical contraception has changed a lot since then. Today's Please Explain is about the chemistry of birth control. Dr. Rini ...

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Please Explain: Smell

Friday, July 06, 2007

On today's Please Explain, we get nosey with smell. Biophysicist Dr. Luca Turin and psychobiologist Dr. Charles Wysocki explain what odors are, how our noses work, and what kind of information humans can gather by smell.

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