There are four important warning signs that should prompt you to talk to a health care provider. 1  Pain. Pain from arthritis can be constant or it may come and go. 2  Swelling. Some types of arthritis cause the skin over the affected joint to become red and swollen, feeling warm to the touch. 3  Stiffness.
There's a whole lot of water on Earth! Something like 326,000,000,000,000,000,000 gallons (326 million trillion gallons) of the stuff (roughly 1,260,000,000,000,000,000,000 liters) can be found on our planet. This water is in a constant cycle -- it evaporates from the ocean, travels through the air, rains down on the land and then flows back to the ocean.
How much water is in the Pacific Ocean? The Pacific Ocean is the largest of all the oceans and comprises about 48 percent of all ocean water. There are over 321 million cubic miles of water in all the oceans combined, according to the National Oceanic and Atmospheric Administration's National Geophysical Data Center.