Healing Hearts Space Jewelry and the Newest Mammal

amazing and sometimes adorable secrets are hidden everywhere around us in this week we've found some of them in museums in cloud forests and the human heart I'm Hank green welcome to scishow news heart disease is the world's leading cause of death killing about 7 million people a year but cardiologists from San Francisco's Gladstone institutes writing this week in the journal stem cell reports say that they might change that statistic they have figured out how to cope cells in the human heart to turn into new beating cells after a heart attack many crucial cells in the heart die these beating cells are called myocardial sites and without them your heart can't do its job the scientists found a way to reprogram other heart cells called fibroblasts they form scar tissue around damaged cells and make up about half your hearts mass while experimenting on mice the cardiologists first added a mix of three genes to fibroblasts and found that they soon started acting like beating cells when they tried to do the same thing to human cells in a petri dish it didn't work so they turned to the human genome and identified 16 genes that are important to the development of myocardial sites at the embryonic stage I went ahead and added all of those genes to the fibroblasts in a petri dish and sure enough almost all of the cells were able to transform into beating cells the cardiologists say gene treatments like this could completely change how people recover from heart attacks for now though they just want to test the procedure on live large mammals like pigs another great discovery this week ancient Egyptians were using iron thousands of years before the iron age thanks to space this story starts in 1911 when nine iron beads were discovered in a 5,000 year old cemetery predating iron smelting by 2,000 years only recently did scientists from the University College of London study the beads closely using x-ray scans to determine that they were an alloy of iron nickel cobalt phosphorus and germanium a unique combination only found in meteorite iron and after analyzing the beads further they found that ancient Egyptians actually seemed pretty handy at meteorite smithing turns out Egyptians were familiar enough with the exotic metal that they had a special process for turning it into jewelry hammering it into thin sheets and rolling it into so while it would take about 2,000 more years before they figured out how to make their own iron when they did they were ready for it so thanks space for helping us get ready for the Iron Age what's most surprising about this is that the beads have been in a London Museum for a hundred years until now nobody thought to ask how 5000 year old Egyptians were using iron the discovery was hiding in plain sight much like the olinguito you probably heard about these little guys by now it's the first mammal to be discovered in the Americas in 35 years and it too has been hanging around in museums for the past century the whole time it turns out scientists were mistaking it for its larger relative the alingas Smithsonian biologist studying the lingos came across a Pelt and skeleton at the Chicago Field Museum filed away as a lingo stuff and thought this looks weird a DNA analysis along with anecdotes about strange little alingas acting weird and various zoos confirmed that this was in fact a different species zoologist traced olinguito s-- to their habitat in Ecuadorian and Colombian cloud forests a different habitat from the alingas and had no trouble finding them in the wild the 1-kilogram mostly nocturnal animal lives in treetops and eats fruit nectar and insects even though it has been reported as a carnivore it is in fact an omnivore confusion comes from it being a member of the order carnivora much like the mostly vegetarian giant panda however the main thing being reported about the olinguito and this part is true is that it is cute so whether it's hiding in the cloud forests of South America or a museum exhibit there's still plenty out there to discover thanks for watching this episode of scishow if you want to stay up to date on all the latest breaking news you can go to youtube.com/scishow and subscribe [Music]