- This 1,920-acre site and its surrounding landscape are characterized by steep, rugged terrain and narrow canyons that terminate at the edge of the Columbia River. The preserve contains one of the largest known populations of Thompson’s clover, a plant that is state-listed as “threatened,” and a population of longsepal globemallow, a state-listed “sensitive” plant. The preserve, which also contains grasslands and scattered ponderosa pine and Douglas-fir, is susceptible to-and has evolved with-frequent natural fires. The rare plants at this site are adapted to this fire regime. Thompson’s clover relies on fire to remove encroaching trees and reduce competition in its habitat, while fire and heat enhance seed germination for longsepal globemallow, resulting in dramatic increases on the preserve following the most recent wildfires in 1988 and 2014.
- Hydrogen (Wikipedia)
Hydrogen is a chemical element; it has the symbol H and atomic number 1. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the formula H2, called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas H2 (dihydrogen) and in molecules, such as in water and organic compounds. The most common isotope of hydrogen, 1H, consists of one proton, one electron, and no neutrons.