Extraterrestrial liquid water Extraterrestrial liquid water Extraterrestrial liquid water (from the Latin words: "extra" ["outside of, beyond"] and "terrestris" ["of or belonging to Earth"]) is water in its liquid state that naturally occurs outside Earth. It is a subject of wide interest because it is recognized as one of the key prerequisites for life as we know it and thus surmised as essential for extraterrestrial life. With oceanic water covering 71% of its surface, Earth is the only planet known to have stable bodies of liquid water on its surface, and liquid water is essential to all known life forms on Earth. The
Oil and gas law in the United States for it is paid without deducting costs of drilling, completing, or operating the well. Whether or not the operator can deduct costs of treating, transporting, or marketing the oil and gas, if not specified in the lease, has been a matter of legal dispute. The traditional royalty rate for oil and gas in the United States was one-eighth (12.5 percent), although today it is often higher. Some states, such as Pennsylvania and West Virginia, have set the legal minimum royalty for private oil and gas leases to one-eighth. In an "unless-delay rental" lease, a lessee agrees to pay delay rentals