Yellow, one of the oldest and biggest U.S. trucking businesses, is expected to file for bankruptcy and is in discussions to sell off all or parts of the business. Photo: CJ Gunther/Shutterstock ...

Giant groundsels are rare plants that grow up to 30 feet (9 meters) tall. They are endemic to the slopes of Mount Kilimanjaro, a dormant volcano in Tanzania and Africa's tallest mountain.