This Day In History: Beatles Kick Off First US Tour

The Beatles took America by storm during their famous first visit, wowing the millions who watched them during their historic television appearances on The Ed Sullivan Show in February 1964. But after the first great rush of stateside Beatlemania, the Beatles promptly returned to Europe, leaving their American fans to make do with mere records. By late summer of that same year, however, having put on an unprecedented and still unmatched display of pop-chart dominance during their absence, the Beatles finally returned. On August 19, 1964, more than six months after taking the East Coast by storm, the Fab Four traveled to California to take the stage at the Cow Palace in San Francisco for opening night of their first-ever concert tour of North America.

Moderate Drinking Cuts Risk of Alzheimer's, Study Shows

Light to moderate social drinking, a glass or two of wine or beer a day, can reduce the risk of developing Alzheimer's disease, according to American researchers.

After analyzing more than 140 studies dating back to 1977 and involving more than 365,000 people, scientists at Loyola University Chicago Stritch School of Medicine found that moderate drinkers were 23 percent less likely to develop forms of dementia and cognitive impairment.

Moderate drinking is defined as a maximum of two drinks per day for men and one drink for women.

World's Sexiest Accents

In the unending pursuit of love, or its less eternal surrogate, the right accent can be as attractive as bright eyes, a beaming smile and a parabolic backside.

For world travelers, a far-flung tongue promises the unknown, confirms the known and dispels the thought-we-knew.

But no accent is sexy when it’s strong enough to crush a beer can. Which means not all accents are created equal.

It’s estimated that there are nearly 7,000 languages on earth. That’s nearly 7,000 different ways to traipse clumsily through the English language -- or to sex it up like a Justin Timberlake song wrapped in chocolate cleavage.

Grand Rapids Man Nominated Sleeping Bear Dunes For "Most Beautiful Place In America"

The Sleeping Bear Dunes National Lakeshore gained national attention yesterday when it was named “The Most Beautiful Place In America.”

Now a Grand Rapids man is receiving a lot of attention of his own for nominating the site in the first place.

The segment aired Wednesday on Good Morning America.  With thousands of votes cast on its behalf, the dunes beat out beaches in Hawaii and picturesque spots like Cape Cod.

Diamond Particles Found in Candle Flames, Scottish Scientists Say

Candle flames contain millions of tiny diamond particles, Scottish scientists said Thursday.

Researchers successfully removed particles from the center of a candle flame for the first time and found that around 1.5 million diamond nanoparticles are created in the flame every second.

Dr. Wuzong Zhou, from the University of St. Andrews, in eastern Scotland, embarked on the study after a challenge from a fellow academic.

"A colleague at another university said to me, 'Of course no one knows what a candle flame is actually made of.' I told him I believed science could explain everything eventually, so I decided to find out," he said.