Union Square transforms into massive garden for Tulip Day celebration

Union Square was transformed into a colorful garden for Tulip Day, with 80,000 tulips on display for attendees to pick their own bouquets, free of charge. The one-day event drew thousands of people, some arriving as early as 6 a.m., to celebrate the arrival of spring and take part in the floral festivities.

‘Doomsday Clock’ closer than ever to midnight

Earth is moving closer to destruction, a science-oriented advocacy group said Tuesday as it advanced its famous "Doomsday Clock" to 89 seconds till midnight, the closest it has ever been.

Jimmy Carter: The first ‘green’ president

Former President Jimmy Carter will be widely remembered as a champion of conservation, but perhaps fewer know just how much he did to preserve his home state of Georgia and beyond.