Story : In this episode of SciTech Now, we meet wildlife cops on the Columbia River working hard to stop poachers from catching and killing valuable sturgeon; we ask a scientist “Does extinction matter?” We go “Inside the Lab” and visit a group of Central Florida engineers who are building a flight simulator; Hari Sreenivasan sits down with MIT Professor Manolis Kellis to discuss this human epigenome; and we meet an expert at the American Museum of Natural History who explains the mysterious phenomenon dark energy.