"Changing Nature" is the seventh episode of season four of the family sitcom Dinosaurs and the 58th episode overall. It is also the series finale.


Earl makes a terrible mistake when he tampers around with nature and starts an ice age which leads to the extinction of the dinosaurs.


It's May 14, the day when the bunch beetles return to Pangaea to migrate, and also eat all of the cider poppies that have been growing. But for some reason, they don't show up when expected. Ethyl mentions that they have never been late like this before. Four days later, the cider poppies are growing like crazy, into the inside of the Sinclair household.

A bunch beetle, Stan, finally shows up. He tells the Sinclairs that he was traveling with other bunch beetles, but then halfway to the swamp, he remembered that he left the sink running, and is now lost. Earl tells him that he's supposed to eat the cider poppies, but Stan doesn't have time to eat because he has to go to the swamp, find a female, mate, and reproduce due to his shortened lifespan. They realize that it's the baby bunch beetles who eat the cider poppies, and also learn that Stan can't find the swamp.

Charlene takes Stan to the swamp, and they are shocked to discover that WESAYSO tore it down in order to pave way for a wax fruit factory. A factory worker sees Stan and is about to spray him, but Charlene stops him in defense of the bunch beetle. The worker then informs her that all of the bugs that got near the factory have been sprayed.

As Earl and Fran cut down plants in the living room, they watch Charlene and Stan on the news. Charlene informs the news that Stan is the last bunch beetle because WESAYSO tore down the swamp and endangered the species just to build a wax fruit factory, making progress just for the sake of progress.

When Earl realizes that Charlene is being interviewed from in the kitchen, he defends WESAYSO and also supports progress, saying that he can deal with any sacrifice as long as there is new technology. B.P. Richfield watches the program, and gets a call from his boss, knowing that this report could cause trouble for the company. After seeing Earl defend progress, Richfield gets the idea to start a task force, and find somebody dumb enough to volunteer to be in charge.

Earl and Roy are interviewed about the task force, explaining that they plan on poisoning the cider poppies. Earl's family begs him to consider a safer alternative, but he refuses. Helicopters fly all over the world, spraying poison on the poppies. The next day, it is reported that the process worked too well: not only are the poppies gone, but so are all forms of plant life on earth, which means that there is no food.

Earl and Roy ask Richfield for a plan to bring back the plants. Richfield initially hasn't thought of anything, but then realizes that it needs to rain in order for the plants to grow back, and rain comes from clouds. Richfield figures that clouds always come whenever volcanoes erupt, so he plans on throwing a bunch of bombs into volcanoes so that there will be a lot of clouds. Since the last plan had backfired, Earl suggests that they think twice about it, but Richfield convinces Earl that this is no time to lose faith in progress.

Bombs are thrown into the volcanoes, but instead of raining, it snows instead. Earl figures that when the sun comes up, the snow will melt and there will be plenty of water. However, Howard Handupme reports that the clouds are so thick that scientists have predicted it will take tens of thousands of years before the sun will melt away the snow. Earl calls Richfield, who doesn't see this as a problem.

Because of the sudden "cold snap", people are buying a lot of WESAYSO logs, heaters, blankets and hot cocoa mixes. Earl points out that the world might come to an end, but Richfield misses the point, and is only concerned about dealing with all the funds he has now made.

Earl apologizes to Stan for the extinction of his species, and apologizes to his family for bringing the world to an end. Earl says that his problem was putting too much faith in progress and having not enough respect for nature, taking it for granted because it is always there. He tells the Baby that he didn't take very good care of the world, but Baby is reassured that no matter what happens, they will always be a family.

In the final scene, anchorman Howard Handupme signs off for the final time. The ending credits roll with scenes of snow falling around the Sinclair home, signaling the start of a volcanic/nuclear winter.

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Dinosaurs (episode list) • VideographyCreating Dinosaurs: The Sketches That Started It AllDinosaurs: Classic TalesDinosaurs (comic book)Big SongsI'm the Baby (Gotta Love Me)Dinosaurs Live!Gotta Love Me! Game
Main: Earl SinclairFran SinclairRobbie SinclairCharlene SinclairBaby Sinclair
Supporting: Ethyl PhillipsRoy HessBradley P. RichfieldMonica DeVertebraeSpikeMindyHoward Handupme
Others: Mr. AshlandMel LusterGaryBuddy GlimmerPredator • Graptolites • SparkyGeneral ChowCabbyMauriceCaroline FoxworthSolomon the GreatRamonaGus MolehillGlenda Molehill • Richard • Al "Sexual" HarrisOtto LynchMason DixonBarry WolfeHarold HefferJerry ValentineGrandpa Louie • Lucius • Cookie CreatureGeneral H. Norman ConquestEdward R. HeroFox JacketHeather Worthington • Pterodactyl • André • Richard Simmons Dinosaur • Shelly • Larry • Stu Boombird • Ted Hardshell • Baby CuddlebunnyWeremanDr. FicusZabarWendy RichfieldMuseHenri and Simone PouponFrancois PouponChief Elder • Raoul • Leeza • Sally • DolfHowlin' JaySonny • Ty Warner • Kyle • Hank Hibler • IgorWinstonDr. HerderThe BabysitterBlarneyDr. Elliott PiagetBertStan • Les • Ray GherkinMoola the Cash Cow • Jean-Claude • Brigitte • GeorgieCavepeopleCavelingsLing Ling and Chang ChangMr. UghMiss HoneywellSir David Tushingham
Season One: "The Mighty Megalosaurus" • "The Mating Dance" • "Hurling Day" • "High Noon" • "The Howling"
Season Two: "The Golden Child" • "Family Challenge" • "I Never Ate for My Father" • "Charlene's Tale" • "Endangered Species" • "Employee of the Month" • "When Food Goes Bad" • "Career Opportunities" • "Unmarried... with Children" • "How to Pick Up Girls" • "Switched at Birth" • "Refrigerator Day" • "What "Sexual" Harris Meant" • "Fran Live" • "Power Erupts" • "The Clip Show" • "A New Leaf" • "The Last Temptation of Ethyl" • "Nuts to War" • "And the Winner is..." • "Slave to Fashion" • "Leader of the Pack" • "WESAYSO Knows Best"
Season Three: "Nature Calls" • "Baby Talk" • "Network Genius" • "The Discovery" • "Little Boy Boo" • "Germ Warfare" • "Hungry for Love" • "License to Parent" • "Charlene's Flat World" • "Wilderness Weekend" • "The Son Also Rises" • "Getting to Know You" • "Green Card" • "Out of the Frying Pan" • "Steroids to Heaven" • "Honey, I Miss the Kids" • "Swamp Music" • "Dirty Dancin'" • "If I Were a Tree" • "We Are Not Alone" • "Charlene and Her Amazing Humans" • "The Clip Show II"
Season Four: "Monster Under the Bed" • "Earl, Don't Be a Hero" • "The Greatest Story Ever Sold" • "Driving Miss Ethyl" • "Earl's Big Jackpot" • "Terrible Twos" • "Changing Nature"
Unaired: "Scent of a Reptile" • "Earl and Pearl" • "Life in the Faust Lane" • "Variations on a Theme Park" • "Working Girl" • "Into the Woods" • "Georgie Must Die!"
PangaeaThe Sinclair HomeSinclair CityWESAYSOB.P. Richfield's TrailerBob LaBrea High SchoolMel Luster's Mating Dance AcademyDepartment of Marriage VowsAbsolute Proof LaboratoriesKave MartLe PredateurMeteor Tiki Lounge • Office of Male Supremacy • Silent SpringsWesaysoland
Dinosaur TVDNNDTVAntediluvian Broadcasting CompanyThe Great Potato
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