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2. Crown closure - Wikipedia

   en.wikipedia.org/wiki/Crown_closure

   Crown closure, also known as canopy closure, is an integrated measure of the canopy "over a segment of the sky hemisphere above one point on the ground". [1] Crown cover is the proportion of a stand covered by the crowns of live trees. A forest stand can have a crown cover of 100% and a crown closure less than 100%.

3. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   Poly (methyl methacrylate) (PMMA) is the synthetic polymer derived from methyl methacrylate. It is used as an engineering plastic, and it is a transparent thermoplastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others (see below).

4. Reef aquarium - Wikipedia

   en.wikipedia.org/wiki/Reef_aquarium

   A reef aquarium or reef tank is a marine aquarium that prominently displays live corals and other marine invertebrates as well as fish that play a role in maintaining the tropical coral reef environment. A reef aquarium requires appropriately intense lighting, turbulent water movement, and more stable water chemistry than fish-only marine ...

5. List of largest aquariums - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_aquariums

   Large aquariums exhibit a large number of species and animals in a large range of tanks. These tend to be public aquariums and may also be oceanariums and dolphinariums, in order to exhibit a wide range of different marine animals for the public. In operation Only aquariums with a total capacity of more than 10 million litres and/or a tank larger than 5 million litres are included in the list ...

6. Aquarium - Wikipedia

   en.wikipedia.org/wiki/Aquarium

   A freshwater aquarium with plants and various tropical fish. An aquarium (pl.: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquatic reptiles, such as turtles, and aquatic plants.

7. Grand Canyon waterline breaks: How to salvage your vacation - AOL

   www.aol.com/grand-canyon-waterline-breaks...

   September 3, 2024 at 7:04 AM. Grand Canyon National Park has announced it will temporarily halt overnight stays on the South Rim (affecting El Tovar, Bright Angel Lodge, and Maswik Lodge, plus ...