- Marijuana (word) (Wikipedia)
Marijuana, or marihuana, is a name for the cannabis plant, specifically, a drug preparation from it. “Marijuana” as a term varies in usage, definition and legal application throughout the world. Some jurisdictions define “marijuana” as the whole cannabis plant or any part of it, while others refer to “marijuana” as a portion of the cannabis plant that contains high levels of tetrahydrocannabinol (THC). Some jurisdictions recognize “marijuana” as a distinctive strain of cannabis, the other being hemp. For legal, research and statistical reference, “marijuana” generally refers to only the dried leaves and flowering tops (herbal cannabis), with by-products such as hashish or hash oil being uniquely defined and regulated. A variety of theories have been postulated for origins of the term marijuana.
- Hadean (Wikipedia)
The Hadean (IPA: /heɪˈdiːən, ˈheɪdiən/ hay-DEE-ən, HAY-dee-ən) is the first and oldest of the four known geologic eons of Earth’s history. The Hadean eon started with the planet’s formation about 4.54 Bya, now defined as (4567.30 ± 0.16) Mya set by the age of the oldest solid material in the Solar System found in some meteorites about 4.567 billion years old. The proposed interplanetary collision that created the Moon occurred early in this eon, and the Late Heavy Bombardment is hypothesized to have occurred at the end of the eon. The Hadean ended 4.031 billion years ago, and was succeeded by the Archean eon.