Dolphins hear sounds with wavelengths that range from 1 to 150 kilohertz. This is much larger than the human range of 0.2 to 17 kilohertz and reflects the fact that dolphins communicate using high-frequency sounds. More »

Dolphins are types of cetacean mammals that are closely related to porpoises and whales. They range in size from 4 feet to 30 feet and weigh up to 10 tons. Dolphins have a single blowhole, cone-shaped teeth and a pronoun... More »

Some interesting facts about dolphins are that they belong to the order Cetacea, are mammals that can live in either saltwater or freshwater environments, depending on the species, and have very good hearing and vision. ... More » Pets & Animals Mammals Marine Mammals

While many teenagers can hear sounds in the 16 kilohertz range or higher, most adults past the age of 25 cannot. For this reason, 17-kilohertz ring tones are popular among high school students who want to receive message... More »

Flatworms occupy a broad range of habitats in salt water, fresh water and wetlands. They exist as parasites within or upon host organisms, or as free-living organisms. More »

According to Blue Planet Biomes, the temperate grassland food chain includes plants, insects and a wide range of larger animals that work together to meet the needs for energy within the ecosystem. The temperate grasslan... More »

Arica, a coastal city in northern Chile, is home to a wide range of marine and land animals as well as birds. Dolphins, sea lions and several species of whale live along the coast, and the chinchilla, alpaca and flamingo... More » Science Biology Zoology