3 results for “dolphin”

1. Animals

   Whales and Dolphins

   dolphins and porpoises, about 90 species of them, and they include the largest animals ever to have

   Article · 4 min read

   

2. Matter, Energy & Physics

   Sound

   Dolphins use clicks to sense fish and objects underwater. People copied the idea with sonar, which

   Article · 3 min read

   

3. Animals

   Mammals

   dolphins returned to the sea 50 million years ago, their front legs becoming flippers and their

   Article · 4 min read