Jack Dumbacher, a curator of Ornithology and Mammalogy at he California Academy of Sciences in San Francisco, Calif., is studying the alarming impact...
Paleontologist Dougal Dixon sits in front of model of creature called the Desert Leaper and has one called the Nightstalker on his shoulder at...
Paleontologist Dougal Dixon sits in front of model of creature called the Desert Leaper and has one called the Nightstalker on his shoulder at...
President Barack Obama touches a bone fragment of "Lucy", who was estimated to have lived 3,2 million years ago, alongside Zeresenay Alemseged , head...
President Barack Obama touches a bone fragment of "Lucy", who was estimated to have lived 3,2 million years ago, alongside Ethiopian Prime Minister...
President Barack Obama looks at a bone fragment from "Lucy" who was estimated to have lived 3.2 million years ago, shown by Dr. Zeresenay Alemseged...
President Barack Obama looks at a bone fragment from "Lucy" who was estimated to have lived 3.2 million years ago, held by Dr. Zeresenay Alemseged...
California Academy of Sciences senior biologist Jarrod Willis gives an African Penguin a Valentine's Day card at the California Academy of Sciences...
An African Penguin pulls a Valentine's Day card from California Academy of Sciences senior biologist Jarrod Willis at the California Academy of...企鵝
An African Penguin carries a Valentine's Day card at the California Academy of Sciences on February 13, 2014 in San Francisco, California. In honor...
California Academy of Sciences senior biologist Jarrod Willis gives an African Penguin a Valentine's Day card at the California Academy of Sciences...
California Academy of Sciences senior biologist Jarrod Willis gives an African Penguin a Valentine's Day card at the California Academy of Sciences...
California Academy of Sciences senior biologist Jarrod Willis gives an African Penguin a Valentine's Day card at the California Academy of Sciences...
An African Penguin carries a Valentine's Day card at the California Academy of Sciences on February 13, 2014 in San Francisco, California. In honor...
Albino alligator "Claude" in his enclosure at the California Academy of Sciences, San Francisco, California, September 2, 2023.
Albino alligator "Claude" in his enclosure at the California Academy of Sciences, San Francisco, California, September 2, 2023.短吻鱷
Albino alligator "Claude" in his enclosure at the California Academy of Sciences, San Francisco, California, September 2, 2023.
Albino alligator "Claude" in his enclosure at the California Academy of Sciences, San Francisco, California, November 27, 2024.
Albino alligator "Claude" in his enclosure at the California Academy of Sciences, San Francisco, California, November 27, 2024.短吻鱷
The Ladies' Flower-Garden of Ornamental Perennials London, 1843-44 Floriculture Flowers California Academy of Sciences Ranunculus monspeliacus...
The ladies' flower-garden of ornamental perennials London, 1843-44 floriculture flowers California Academy of Sciences Ranunculus asiaticus Jane Webb...
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...短吻鱷, 白食症患者, 另類的
Banner celebrating the 30th birthday of a rare albino alligator named Claude is posted at the California Academy of Science on September 17, 2025 in...白食症患者, 短吻鱷
Rare albino alligator named Claude is reflected in water as it sits in its enclosure at the California Academy of Science on September 17, 2025 in...白食症患者, 短吻鱷, Topix
Visitor signs a birthday card for a rare albino alligator named Claude at the California Academy of Science on September 17, 2025 in San Francisco,...
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...白食症患者, 短吻鱷
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...白食症患者, 短吻鱷
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...短吻鱷, 白食症患者
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...短吻鱷, 白食症患者
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...白食症患者
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...白食症患者, 短吻鱷
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...短吻鱷, 白食症患者
Rare albino alligator named Claude sits in its enclosure at the California Academy of Science on September 17, 2025 in San Francisco, California. The...短吻鱷, 白食症患者
View of a Red-crested turaco bird at the Osher Rainforest of the California Academy of Sciences in San Francisco, California, United States on...
View of a Red-crested turaco bird at the Osher Rainforest of the California Academy of Sciences in San Francisco, California, United States on...
View of Blue tang fish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on...
Diver Jenna Holland in water greets visitors at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
View of Plumed basilisk as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on...
Diver Jenna Holland in water greets visitors at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States...
View of Plumed basilisk as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on...
View of Blue tang fish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
View of a Red-crested turaco bird at the Osher Rainforest of the California Academy of Sciences in San Francisco, California, United States on...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
Diver Jenna Holland in water greets visitors at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States...
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...
Two young ladies watch fishes at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States on September...
Diver Jenna Holland in water greets visitors at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States...
Woman watches fishes at Steinhart Aquarium of the California Academy of Sciences in San Francisco, California, United States on September 14, 2025....
View of jellyfish as people visit Steinhart Aquarium at the California Academy of Sciences in San Francisco, California, United States on September...