1 The training course is five weeks. 2  During the first two weeks, students are in the classroom. 3  During the second three weeks, students complete a clinical externship at various Intermountain Healthcare hospitals.
But surprisingly, we still donât know how many species live by the shore: estimates vary widely, from 178,000 species to more than 10 million. NaGISA scientists pulled on their boots and waded and dived in coastal waters around the world to estimate the number of species on our coasts more precisely.
The document proposes a working estimate of 13.6 million species on Earth. But some field scientists, such as Erwin, dismiss this as armchair biology.. Of course, the only way to really find out how many species inhabit the planet is to go out and count them, one by one. Spurred by concern over species extinctions, several scientists over the past decade have advocated such a complete global biological survey.