Santa Cruz Mountains in the context of "Mountain View, California"

The Santa Clara Valley (Spanish: Valle de Santa Clara) is a geologic trough in Northern California that extends 90 miles (140 km) south–southeast from San Francisco to Hollister. The longitudinal valley is bordered on the west by the Santa Cruz Mountains and on the east by the Diablo Range; the two coastal ranges meet south of Hollister. The San Francisco Bay borders the valley to the north, and fills much of the northern third of the valley. The valley floor is an alluvial plain that formed in the graben (tectonic depression) between the San Andreas Fault to the west and the Hayward and Calaveras faults to the east.Within the valley and surrounding the bay on three sides are the urban communities of San Mateo County, Santa Clara County, and Alameda County, while the narrow southern reaches of the valley extend into rural San Benito County to Hollister. In practical terms, the central portion of the Santa Clara Valley is often considered by itself, contained entirely within Santa Clara County.

The valley, named after the Spanish Mission Santa Clara, was for a time known as the Valley of Heart's Delight for its high concentration of orchards, flowering trees, and plants. Until the 1960s it was the largest fruit-producing and packing region in the world, with 39 canneries. The growing high-tech industry in the 1960s transformed the area from farmland to densely populated cities, and it became referred to as Silicon Valley.

Cupertino (/ˌkuːpərˈtiːnoʊ/ KOOP-ər-TEEN-oh) is a city in Santa Clara County, California, United States, directly west of San Jose on the western edge of the Santa Clara Valley with portions extending into the foothills of the Santa Cruz Mountains. The population was 60,381 as of the 2020 census, decreasing by 1,671 (-2.9%) to a Census-estimated 58,710 by 2024. The city is the home of Apple Inc., headquartered at Apple Park.

Named for a local creek by Spanish explorer Juan Bautista de Anza's cartographer bearing the name of Saint Joseph of Cupertino, Cupertino was officially incorporated in 1955, though it saw economic activity in the early 19th century. The area was originally an agricultural community producing prunes, apricots and cherries, with a winery joining the ranks by the 19th century. Cupertino grew immensely during the 1950s due to the suburban housing boom experienced after the Second World War, concurring with the earliest roots of Silicon Valley developing near Cupertino. By the 1960s, office parks were being built and technology companies were setting up shop in the city, most notably Apple and Hewlett-Packard.

Over 50 villages and tribes of the Ohlone (also known as Costanoan) Native American people have been identified as existing in Northern California circa 1769 in the regions of the San Francisco Peninsula, Santa Clara Valley, East Bay, Santa Cruz Mountains, Monterey Bay and Salinas Valley. The known tribe names and village locations of people who spoke the Costanoan languages are listed by regions below.

In 1925, Alfred Kroeber, then director of the Hearst Museum of Anthropology, declared the tribe extinct, which directly led to its losing federal recognition and land rights.

Ballooning, sometimes called kiting, is a process by which spiders, and some other small invertebrates, move through the air by releasing one or more gossamer threads to catch the wind, causing them to become airborne at the mercy of air currents and electric fields. A 2018 study concluded that electric fields provide enough force to lift spiders in the air, and possibly elicit ballooning behavior. This is primarily used by spiderlings to disperse; however, larger individuals have been observed doing so as well. The spider climbs to a high point and takes a stance with its abdomen to the sky, releasing fine silk threads from its spinneret until it becomes aloft. Journeys achieved vary from a few metres to hundreds of kilometres. Even atmospheric samples collected from balloons at five kilometres altitude and ships mid-ocean have reported spider landings. Ballooning can be dangerous (due to predators, and due to the unpredictable nature of long-distance ballooning, which may bring individuals to an unfavorable environment).

It is observed in many species of spiders, such as Erigone atra, Cyclosa turbinata, as well as in spider mites (Tetranychidae) and in 31 species of lepidoptera, distributed in 8 suborders. Bell and his colleagues put forward the hypothesis that ballooning first appeared in the Cretaceous. A 5-year-long research study in the 1920s–1930s revealed that 1 in every 17 invertebrates caught mid-air is a spider. Out of 28,739 specimens, 1,401 turned out to be spiders.