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The knobcone pine, Pinus attenuata (also called Pinus tuberculata), [2] is a tree that grows in mild climates on poor soils. It ranges from the mountains of southern Oregon to Baja California with the greatest concentration in northern California and the Oregon-California border.
Even the tree's needles, which grow in bunches of five, can remain on the tree for forty years, which gives the tree's terminal branches the unique appearance of a long bottle brush. The bristlecone pine's root system is mostly composed of highly branched, shallow roots, while a few large, branching roots provide structural support.
A dendrochronology, based on these trees and other bristlecone pine samples, extends back to about 9000 BC, albeit with a single gap of about 500 years. [20] [3] An older bristlecone pine was reportedly discovered by Tom Harlan in 2009, based on a sample core collected in 1957. According to Harlan, the tree was 5,062 years old and still living ...
Pinus, the pines, is a genus of approximately 111 extant tree and shrub species. The genus is currently split into two subgenera: subgenus Pinus (hard pines), and subgenus Strobus (soft pines). Each of the subgenera have been further divided into sections based on chloroplast DNA sequencing [1] and whole plastid genomic analysis. [2]
The Pinaceae (/ p ɪ ˈ n eɪ s iː ˌ iː,-s i ˌ aɪ /), or pine family, are conifer trees or shrubs, including many of the well-known conifers of commercial importance such as cedars, firs, hemlocks, piñons, larches, pines and spruces.
OpenAI says DeepSeek, its sudden Chinese rival, may have "inappropriately” taken data from its model to spin up its own artificial intelligence chatbot. DeepSeek released a surprisingly ...
OpenAI CEO Sam Altman and Elon Musk sparred publicly Monday after the Wall Street Journal reported that Musk and other investors have fielded a $97.4 billion offer to take control of the AI giant.
The Methuselah Grove trail starts from the visitor center at 9,846 feet (3,001 m) and makes a 4.5-mile (7.2 km) loop that includes the side valley of the Methuselah Grove where the oldest tree lives, a high section looking out eastward over Nevada's basin-and-range region, and side trails to old mining sites.