iOS app Android app

David Freeman
GET UPDATES FROM 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

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

(112) 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...

Read Post

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

(0) 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...

Read Post

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...

Read Post

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...

Read Post

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

Read Post

These 14 Images Of The Sun May Be The Most Spectacular Ever Snapped

(21) Comments | Posted January 21, 2015 | 3:28 PM

The surface of the sun is constantly changing. To make sure it doesn't miss anything, NASA's Solar Dynamics Observatory (SDO) spacecraft is constantly taking photos of the sun.

One of the three instruments aboard the spacecraft, the four-telescope Atmospheric Imaging Assembly, is especially prolific; it takes a...

Read Post

Circumcision Linked To Autism In Controversial New Study

(454) Comments | Posted January 20, 2015 | 8:41 AM

A controversial new study from Denmark shows a link between circumcision and autism, although experts differ sharply over what to make of it.

For the study, published online Jan. 8, 2015 in the Journal of the Royal Society of Medicine, a pair of researchers looked at

Read Post

그리스-로마 시대의 양면 부적이 발견되다(사진)

(0) Comments | Posted January 19, 2015 | 10:03 PM

약 1,500년 전에 만든 것으로 추정되는 신비로운 부적이 발견돼 고고학계가 술렁이고 있다. 폴란드 야기에우워 대학교 고고학과의 요아힘 슬리바 교수가, 키프로스 섬 남서부에 있는 유적지, 네아 파포스에서 2011년에 발견된 돌의 양면에 새겨진 문자와 그림의 기원을 밝혔다.

이 돌의 한쪽 면에는 고대 그리스어 문자 59개가 새겨져 있다. 이 문자들은 앞으로...

Read Post

Giant Asteroid Is Headed Our Way, But NASA Says No Worries

(197) Comments | Posted January 18, 2015 | 11:00 AM

A ginormous asteroid is headed our way, but no need to worry. NASA says asteroid 2004 BL86--estimated to be about one-third of a mile in diameter--will zoom harmlessly by Earth later this month.

That's good news, of course. And get this: The asteroid's size and...

Read Post

사라져가는 중성자성의 도움으로 시공간의 왜곡을 측정하다

(0) Comments | Posted January 13, 2015 | 7:43 PM

항성의 무게를 측정하기란 쉽지 않다. 그런데 어느 천문학자 팀이 그런 어려운 과제를 풀었다.


그들은 지구에서 약 25,000광년 떨어진 짝별계에 위치한 두 개의 항성 무게를 계산하는 데 성공했는데, 그 체계의 강력한 중력으로 형성된 시공간 왜곡도 파악해냈다.


이번 연구를 주도한 암스테드람 대학의 천체물리학자 조리 반 류웬은 성명을 통해...

Read Post

Space-Time Warp Measured With Aid Of Vanishing Neutron Star

(35) Comments | Posted January 12, 2015 | 3:32 PM

It's not easy to weigh a star, but an international team of astronomers has done just that.

In fact, they've measured the masses of both stars in an odd binary star system some 25,000 light-years from Earth--and gauged the space-time warp resulting from the system's intense gravitation.

"Our result...

Read Post

The Little Question That Fueled Alan Alda's Big Push For Plain-Spoken Science (PODCAST)

(63) Comments | Posted January 9, 2015 | 10:52 AM

Alan Alda became famous for his film and television roles, including Hawkeye Pierce in the long-running TV series M*A*S*H*. In recent years, however, the 78-year-old actor-writer-director has taken on a new role--as a high-profile champion of science literacy.

Alda professes a lifelong love of science and clearly...

Read Post

太陽の表面に地球より410倍大きい「穴」が出現(画像)

(1) Comments | Posted January 8, 2015 | 9:07 PM

太陽の表面に、地球の数百倍のサイズの暗い「穴」が見つかった。この巨大なコロナホールの画像は、NASAのソーラー・ダイナミクス・オブザーバトリーに搭載されているカメラが2015年1月1日に撮影したものだ。

Read Post

Scientists Discover Ancient 'Magical' Amulet With Odd Two-Way Inscription

(247) Comments | Posted January 6, 2015 | 3:36 PM

A strange "magical" amulet dating back about 1,500 years has archaeologists buzzing.

One side of the stone amulet, which was unearthed in 2011 in the ancient city of Nea Paphos in southwestern Cyprus, bears a 59-letter inscription that reads the same way backward and forward:

ιαεωβαφρενεμουνοθιλαρικριφιαευεαιφιρκιραλιθονυομενερφαβωεαι.

That's...

Read Post

지구보다 수백 배 더 큰 태양의 코로나 구멍이 포착됐다(사진)

(0) Comments | Posted January 6, 2015 | 4:17 AM

거대함의 정의를 다시 써라.


태양 표면에서 지구보다 수백 배나 더 큰 어두운 구멍이 발견됐다. '코로나 구멍'이라고 불리는 이 현상(아래 사진)은 나사의 '솔라 다이나믹스 천문대(Solar Dynamics Observatory)' 망원경으로 1월 1일에 촬영한 것이다.


sun hole
엄청난 크기의 구멍을 나사의 솔라 다이나믹스 천문대의 망원경에 설치된...

Read Post

Coronal Hole Spotted On The Sun Is Hundreds Of Times Bigger Than The Earth

(518) Comments | Posted January 5, 2015 | 2:19 PM

Talk about big!

A dark hole hundreds of times bigger than the Earth has been spotted on the surface of the sun. A photo of the enormous "coronal hole" (below) was snapped by a camera aboard NASA's Solar Dynamics Observatory on Jan. 1, 2015.

(Story continues below...

Read Post

반은 수컷이고 반은 암컷인 새가 발견됐다

(0) Comments | Posted December 31, 2014 | 1:30 AM

조류학자가 아니라도 새에 대해서 조금 아는 사람이라면 빨간 홍관조는 수컷이고 갈색/회색 홍관조는 암컷이라는 사실을 알고 있다.


그런데 반은 빨간색이고 반은 갈색/회색 깃털로 덮인 홍관조는 대체 어떻게 생각해야 할까? 간단하다. 아수라 백작처럼 반은 수컷이고 반은 암컷이라고 여기면 된다. 그런데 이런 말도 안되는 새가 정말로 미국 일리노이주에서 발견됐다.


...

Read Post

Bill Nye Has A 'Trashy' New Year's Resolution

(7) Comments | Posted December 30, 2014 | 4:12 PM

Like his friend Neil deGrasse Tyson, Bill Nye isn't big on New Year's resolutions.

"The changes I want to make are generally part of a process rather than a sudden shift or toggle to a new position," the "Science Guy" told The Huffington Post in an email. "With...

Read Post

This Half-Male, Half-Female Bird Has Very Peculiar Plumage

(174) Comments | Posted December 30, 2014 | 1:27 PM

You don't have to be an ornithologist to know that red northern cardinals are male and brownish-gray ones are female.

But what about a Cardinalis cardinalis that sports red feathers on one side of its body and brownish-gray feathers on the other? Why, that cardinal is half-male...

Read Post

Neil deGrasse Tyson Shares His (Non) New Year's Resolutions

(80) Comments | Posted December 30, 2014 | 8:19 AM

Neil deGrasse Tyson takes a dim view of New Year's resolutions.

"I generally don't have resolutions," he told The Huffington Post in an email. "For me, they are a state of mind, not a state of annual declaration."

But the celebrated astrophysicist owned up to have a couple...

Read Post