It's been 77 years since the 804 foot long German Airship Hindenburg crashed and burned in Lakehurst, New Jersey on May 6, 1937.  There were 97 passengers, 36 of them perished in the disaster and it marked the end of the use of rigid airships in commercial air transportation.  It used hydrogen gas as fuel, but, according to History.com it was originally suppose to use helium gas.  Here is real footage of the Hindenburg disaster.

Variously known as the Fourth of July and Independence Day, July 4th has been a federal holiday in the United States since 1941, but the tradition of Independence Day celebrations goes back to the 18th century and the American Revolution (1775-83). In June 1776,

 
Father's Day traditionally takes a backseat to Mother's Day, and, for the most part, dads are cool with that, experts say.

Nevertheless, as traditional roles around the house gradually change, fathers are gaining more attention on their special day, at least as measured in the monetary value of Father's Day gifts estimated to be given on June 19, 2011, when the holiday will be celebrated in dozens of countries.

First celebrated 101 years ago, Father's Day was, in a way, born of Mother's Day.

The history of Mother's Day is centuries old and goes back to the times of ancient Greeks, who held festivities to honor Rhea, the mother of the gods. The early Christians celebrated the Mother's festival on the fourth Sunday of Lent to honor Mary, the mother of Christ. Interestingly, later on a religious order stretched the holiday to include all mothers, and named it as the Mothering Sunday. The English colonists settled in America discontinued the tradition of Mothering Sunday because of lack of time. In 1872 Julia Ward Howe organized a day for mothers dedicated to peace. It is a landmark in the history of Mother's Day.

Another Earth Day is here, encouraging all of us to live a little "greener".  While I thought Earth Day was something created recently, it turns out Earth Day is a movement that began over 40 years ago in 1970 and it was a much more aggressive political movement.  See a vintage video of the first Earth Day after the jump.