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David Freeman
David Freeman is the senior science editor of The Huffington Post in New York City and the host of Science Insider, a weekly radio program on an NPR station in Sharon, CT.

Entries by David Freeman

Head Transplants Are Coming Soon, At Least If This Doctor Gets His Way

(105) Comments | Posted February 27, 2015 | 1:25 PM

Things didn't go so great for Victor Frankenstein or his monster, but don't tell that to Sergio Canavero.

The Italian doctor believes that it's now possible to slice the head of off one person, stitch it to the decapitated body of another, and then reanimate the two-human mash-up. What's...

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Stem Cells From Wisdom Teeth Seen As Possible Fix For This Common Form Of Blindness

(10) Comments | Posted February 26, 2015 | 9:02 AM

Scientists have taken a key step toward the development of what could be a breakthrough treatment for corneal blindness, a condition that affects millions of people around the world.

The scientists showed that stem cells obtained from the dental pulp of extracted teeth can be turned into...

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(2) Comments | Posted February 25, 2015 | 2:02 AM


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NASA's New Mars Vine Shows A Chilly-Looking 'Blue Sunset' On The Red Planet

(11) Comments | Posted February 24, 2015 | 12:52 PM

If you're the kind of person who wonders what a sunset on Mars might look like, NASA has you covered. The space agency just released a new Vine (below) showing a dim sun sinking below a dark Martian horizon.

It's absolutely otherworldly, and not in a warm...

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Dogs Can Spot People Who Are Trying To Fool Them, Study Shows

(68) Comments | Posted February 23, 2015 | 1:29 PM

Dogs are certainly no dummies when it comes to understanding humans.

Canines can understand our voice commands and know what it means when we point (something even chimps have trouble with)--and recent research shows that they can even read our facial expressions.

Now a...

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Winds From This Massive Black Hole Pack The Energy Of More Than A Trillion Suns

(125) Comments | Posted February 20, 2015 | 3:59 PM

If you think winter winds are fierce, get this: NASA says new measurements made by a pair of space telescopes show that the winds produced by a black hole known as PDS 456 stream outward at up to one-third the speed of light--and carry more energy every second...

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Alien Star Buzzed Our Solar System 70,000 Years Ago, New Research Shows

(72) Comments | Posted February 18, 2015 | 5:48 PM

It's being called a very close shave, at least in astronomical terms: new research indicates that 70,000 years ago a dim star passed within a mere 8 trillion kilometers (5 trillion miles) of our solar system.

That's about one-fifth the distance from the solar system to

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AIDS Drug 'Candidate' Shown To Block Infection By Even The Most Virulent Strains Of HIV

(92) Comments | Posted February 18, 2015 | 1:01 PM

For more than three decades, scientists have tried unsuccessfully to develop an effective vaccine for HIV, the virus that causes AIDS. But now researchers say they have created an experimental drug that may function as a sort of "alternative" vaccine for the virus.

The experimental drug, a protein...

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Here's Why Einstein's Theory Of Relativity Is Absolutely 'Perfect' (PODCAST)

(230) Comments | Posted February 18, 2015 | 10:20 AM

A century has passed since Albert Einstein published his seminal paper on general relativity, and scientists are still using this iconic theory to explain the world.

To Dr. Pedro G. Ferreira, a professor of astrophysics at the University of Oxford in England and the author of a new book about...

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Jupiter's Great Red Spot Glows A Pretty Pink In Luminous New Photo

(12) Comments | Posted February 11, 2015 | 10:24 AM

Jupiter looks blue and its Great Red Spot takes on a strange pinkish hue in a spectacular new photo released Jan. 15 by the National Astronomical Observatory of Japan. That's because the photo shows our solar system's largest planet not in visible but in infrared light.

(Story continues...

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Now We Know How Many Licks It Takes To Reach The Center Of A Lollipop

(13) Comments | Posted February 10, 2015 | 1:12 PM

How many licks does it take to reach the center of a lollipop? A new mathematical model formulated by scientists at New York University and Florida State University pegs the answer at 1,000.

That number is an estimate for a one-inch lollipop, and it holds true only...

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If You Think The Threat Of Nuclear War Went Away, There's Something You Should Know

(43) Comments | Posted February 10, 2015 | 9:28 AM

Almost a quarter of a century has passed since the end of the Cold War, and these days people who worry about the end of the world as we know it seem to focus more on global warming than on nuclear war.

But the nuclear threat hasn't gone...

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Neil deGrasse Tyson Sounds The Alarm Over Science Illiteracy, And For Good Reason

(445) Comments | Posted February 5, 2015 | 3:05 PM

Neil deGrasse Tyson isn't one to mince words.

In recent weeks the celebrated astrophysicist has offered up strong opinions on everything from the motion picture Interstellar (decent science) to New Year's resolutions (doesn't make them) to deflategate (it's complicated).

Recently, HuffPost Science...

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Estudo controverso liga circuncisão na infância a autismo

(1) Comments | Posted February 3, 2015 | 8:25 PM

Um novo estudo polêmico realizado na Dinamarca mostra uma ligação entre circuncisão e autismo, embora os especialistas tenham grandes divergências sobre como interpretá-lo.

No estudo, publicado online em 8 de janeiro no Journal of the Royal Society of Medicine, um par de pesquisadores observou casos de...

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'Ghost Of Jupiter' Photo Shows Spooky-Looking Nebula In A Whole New Light

(15) Comments | Posted February 3, 2015 | 1:39 PM

We've known about the Ghost of Jupiter since 1785, when it was discovered by the German-born astronomer William Herschel (1738-1822). But a captivating new image released by the European Space Agency (ESA) shows the spooky-looking planetary nebula in a whole new light.


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Hair Loss Cure Isn't Here Yet, But Experimental Stem Cell Approach Looks Promising

(120) Comments | Posted January 30, 2015 | 9:26 AM

Hats off to researchers in California. They've taken what appears to be a big step toward the development of a cure for hair loss, a condition that affects 50 million men and 30 million women in the U.S. alone.

The scientists, working at the Sanford-Burnham Medical...

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The Big Asteroid That Just Buzzed Earth Has Its Own Little Moon

(1) Comments | Posted January 28, 2015 | 9:55 AM

Well, that's a surprise.

The big asteroid that just gave Earth a close shave has its own little moon.

The moon measures only about 230 feet across but is plainly visible in new radar images of asteroid 2004 BL86 taken during its flyby (see...

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Rising Ocean Temperatures May Mean Sea Turtles Stop Basking On Land

(23) Comments | Posted January 26, 2015 | 9:01 AM

Warmer oceans will put the chill on sea turtle behavior, causing the endangered animals to stop basking on beaches within the next century.

That's the surprising take-away from a new analysis of turtle surveys and satellite data published Jan. 14, 2015 in the journal Biology...

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Freaky Video Shows What Looks Like Three Suns In Mongolian Sky

(21) Comments | Posted January 24, 2015 | 2:48 PM

Everyone knows Earth has only a single sun. But you might not know it from this fascinating video posted Jan. 22 by The Guardian, which shows what appear to be three suns in the sky over Mongolia.

Of course, it's really only our solitary sun flanked by...

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Estas 14 imágenes del sol podrían ser las más espectaculares que jamás se hayan tomado

(1) Comments | Posted January 22, 2015 | 9:10 AM

La superficie del sol está cambiando constantemente. Para asegurarse de que no se le escape nada, la nave Observatorio Dinámico Solar (SDO, por sus siglas en inglés) de la NASA está continuamente tomando fotografías del astro rey.

Uno de los tres instrumentos a bordo de la astronave, el telescopio

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