A liver hemangioma usually occurs as a single abnormal collection of blood vessels that is less than about 1.5 inches (about 4 centimeters) wide. Occasionally liver hemangiomas can be larger or occur in multiples. Large hemangiomas can occur in young children but this is very rare. In most people, a liver hemangioma will never grow and never cause any signs and symptoms. But in a small number of people, a liver hemangioma will grow to cause complications and require treatment. It's not clear why this happens.
When you set out to take in the Giant redwood trees of California, pack your camera and head south to the parkâs Mariposa Grove. Conveniently located near Yosemiteâs south entrance, Mariposa Grove is home to the Grizzly Giant sequoia, a leisurely 0.8 mile walk from the main parking lot. The oldest known giant redwood trees in California are more than 3,000 years old. 2  The bark of Giant Redwood Trees can be as thick as 4 feet, and helps make them fire resistant. 3  In addition, fires actually help redwoods survive by wiping out smaller trees that would eventually take over.
Sierra redwood trees are the largest trees in the world. Many sierra redwoods are between 250 and 300 feet tall, the tallest being about 325 feet high. While their height is impressive, the real wonder of a sierra redwood lies in its bulk. Many of these giants have diameters in excess of 30 feet near the ground, with a corresponding circumference of over 94 feet!