Old Faithful geyser, sunrise. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named.
John Moulton barn at sunrise with Teton Range, on Mormon Row in Grand Teton National Park, Wyoming.
Sky Rock petroglyphs near Bishop, California, sunrise light just touching clouds and the Sierra Nevada. Hidden atop an enormous boulder in the Volcanic Tablelands lies Sky Rock, a set of petroglyphs that face the sky. These superb examples of native American petroglyph artwork are thought to be Paiute in origin, but little is known about them.
Water falling from the fluke (tail) of a humpback whale as the whale dives to forage for food in the Santa Barbara Channel.
Mono Lake sunset, tufa and clouds reflected in the still waters of Mono Lake.
Sun pillar rises over the Sierra Nevada and this Mono Lake sunset, Sierra Nevada mountain range and tufas, clouds reflected in the still waters of Mono Lake.
Freediving photographer in a cloud of salps, gelatinous zooplankton that drifts with open ocean currents.
Old Faithful geyser. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named.
Panorama of the Teton Range, in Grand Teton National Park, Wyoming. The Teton peaks are seen together at center with Mount Moran to the right. The Snake River lies unseen in the valley below.
Sunset over Patriarch Grove and White Mountains. An ancient bristlecone pine tree at sunset.
T.A. Moulton barn with Teton Range, on Mormon Row in Grand Teton National Park, Wyoming.
Convict Lake sunrise reflection, Sierra Nevada mountains.
Common dolphin at the edge of the ocean.
Common dolphin leaping from the ocean.
Water falling from a blue whale fluke as the whale dives to forage for food in the Santa Barbara Channel.
Sky Rock petroglyphs and storm clouds over the Eastern Sierran Nevada, near Bishop, California. Hidden atop an enormous boulder in the Volcanic Tablelands lies Sky Rock, a set of petroglyphs that face the sky. These superb examples of native American petroglyph artwork are thought to be Paiute in origin, but little is known about them.
UCSD Library glows at sunset (Geisel Library, UCSD Central Library).
Teton Range and Antelope Flat wildflowers, sunrise, clouds.
Dana Fork of the Tuolumne River, near Tioga Pass.
Dana Fork of the Tuolumne River, near Tioga Pass.
Blue whale fluke (tail) lifted high above the water as the whale dives in the Santa Barbara Channel.
Scarring of this humpback whale's fluke allow researchers to identify this particular whale from season to season.
Perfect view of the ventral surface of a humpback whales fluke, as the whale raises its fluke just before diving underwater. The white patches and scalloping along the trailing edge of the fluke make this whale identifiable when it is observed from year to year.
Humpback whale blowhole, showing twin nares (nostrils) which have a few small parasites clinging to the whale's skin around the blowhole openings.
Krill. Likely Euphausia pacifica. A thin cloud of pink krill gathers at the ocean surface, where it is likely to be preyed upon by sharks, fish, birds and whales.
UCSD Library glows at sunset (Geisel Library, UCSD Central Library).
Teton Range reflection, in window of old barn in Grand Teton National Park.
Bacteria mats and Grand Prismatic Spring. The orange color is due to bacteria which thrive only on the cooler fringes of the hot spring, while the hotter center of the spring hosts blue-colored bacteria.
Colonial planktonic pelagic tunicate, adrift in the open ocean, forms rings and chains as it drifts with ocean currents.
T.A. Moulton barn with Teton Range, on Mormon Row in Grand Teton National Park, Wyoming.
Panoramic photo of the Teton Range, reflected in the still waters of Schwabacher Landing, a sidewater of the Snake River.
John Moulton barn at sunrise with Teton Range, on Mormon Row in Grand Teton National Park, Wyoming.
White Dome Geyser, rises to a height of 30 feet or more, and typically erupts with an interval of 15 to 30 minutes. It is located along Firehole Lake Drive.
Wildflowers on Mount Washburn, on the north side of Dunraven Pass near Tower Junction.
Steam rises at sunrise in Norris Geyser Basin. Located at the intersection of three tectonic faults, Norris Geyser Basin is the hottest and most active geothermal area in Yellowstone National Park.
Gibbon River meanders through Gibbon Meadows, sunrise and clouds reflected in the calm waters.
Steam rises at sunrise in Norris Geyser Basin. Located at the intersection of three tectonic faults, Norris Geyser Basin is the hottest and most active geothermal area in Yellowstone National Park.
Yellowstone Falls viewed from Lookout Point with a rainbow. Lower Yellowstone Falls cascades 308' in a thundering plunge into the Grand Canyon of the Yellowstone River.
Mono Lake sunset, Sierra Nevada mountain range and tufas, clouds reflected in the still waters of Mono Lake.
Dana Fork of the Tuolumne River, near Tioga Pass.
Mammoth Peak in the Yosemite High Country, reflected in small tarn pond, viewed from meadows near Tioga Pass.
Tufa towers rise from Mono Lake, with the Eastern Sierra visible in the distance. Tufa towers are formed when underwater springs rich in calcium mix with lakewater rich in carbonates, forming calcium carbonate (limestone) structures below the surface of the lake. The towers were eventually revealed when the water level in the lake was lowered starting in 1941.
Dana Fork of the Tuolumne River, near Tioga Pass.
Ancient bristlecone pine tree, rising from arid, dolomite-rich slopes of the Patriarch Grove in the White Mountains at an elevation of 11,000 above sea level.