Use the news: glow-in-the-dark sharks

Lesson for grades 5-8

Scientists have known for years that deep-sea creatures glow in the dark to find food or protect themselves in the pitch-black waters far beneath the surface of the ocean. Now they are discovering that land animals ranging from flying squirrels to duckbilled platypuses also glow when put under ultraviolet light. And they have just discovered three species of shark that glow in the dark due to “bio-luminescence.” Among them is the largest glow-in-the-dark species with a spine ever found on land or in the oceans.

That honor goes to the kitefin shark, which grows to almost 6

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The kitefin gives off a spectacular blue-green light that looks like something from a science fiction movie, scientists said in study published this month. Also giving off blue-green light are two tiny species of lantern sharks, the scientists said.

Scientists are constantly learning new things about wildlife and sea life.

Activity: In the newspaper or online, find and closely read a story about a new discovery. Use what you read to write a letter to a friend, describing the new discovery, why it is important and what you think is the most interesting thing about it.