imagine a place almost 2 km. below the sea surface. it's always dark - there is absolutely no sunlight. scientists used to think that animals couldn't live without the sun's energy. as a result, they never expected to find
imagine a place almost 2 km. below the sea surface. it's always dark - there is absolutely no sunlight. scientists used to think that animals couldn't live without the sun's energy. as a result, they never expected to find changing old ideas