organisms

Up until recently, habituation -- a simple form of learning -- was deemed the exclusive domain of complex organisms with brains and nervous systems, such as worms, insects, birds, and mammals.

Tests with other organisms showed that the method can even replicate the root structure of fungi, called hyphae.

Many living organisms are able to regenerate damaged or lost tissue, but why some are particularly good at this and others are not is not fully understood.

Living organisms enjoy sunlight -- in fact, many need it to stay alive -- but they tend to avoid light that is too bright.

They also found that these insecticides could affect organisms in the streams that are fed by those springs.