There's so much to celebrate in the month of April. The fourth month of the calendar year ushers in warm weather, tulips and Earth Day, the global celebration of our planet and all its splendor. The ...

This year marks the 55th anniversary of Earth Day! Every year on April 22, people worldwide mobilize to address some of the most urgent threats facing our environment, from climate change to ...

April showers aren't the only thing the fourth month of the calendar year brings. In fact, there are a variety of April holidays to celebrate all month long, including April Fools' Day, Easter, Arbor ...

More than 8 billion people inhabit our planet, and each year Earth Day reminds them of the need to take care of their home. The springtime holiday, which takes place today—April 22—dates back to 1970, ...

Earth Day is one of the most popular and widespread nonreligious holidays in the world. Although the event was primarily based in the United States, by 2009 the coordinators for Earth Day helped gain ...

While Earth Day, observed annually on April 22, may not be a major holiday that’s widely celebrated outside of classrooms, it’s more than worthy of honoring. After all, without Earth, where would we ...

This Earth Day, test your environmental knowledge by participating in CBS News' #OutGreenMe challenge. Grab your phone and quiz someone with the below facts and show us how much you know about our ...

A giant sequoia located in Sequoia National Park in California, the General Sherman is 52,500 feet in volume and is more than 2,000 years old. The General Sherman giant sequoia is the largest known ...