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Proof of evolution that you can find on your body

Proof of evolution that you can find on your body
Related:  EvolutionScience

hur det funkar L'aventure humaine: Des molécules à la culture - Robert Boyd, Joan Silk Karin Bojs: Spår av släktingar för miljarder år sedan I dag, närmare tre tusen år efter det att Första Mosebok först tecknades ned, finns en uppdaterad version baserad på vetenskaplig forskning. Den säger att universum – åtminstone den del av universum som våra instrument kan överblicka – uppstod för 13,7 miljarder år sedan och sedan dess har svalnat och utvidgats kraftigt. Vårt eget solsystem uppstod för ungefär 4,6 miljarder år sedan, från ett hett och roterande gasmoln. Jorden där vi bor började svalna och stelna för ungefär 4,5 miljarder år sedan. Den första tiden var tuff. Då bombarderades vårt nybildade klot av massor av större och mindre himlakroppar. För ungefär 4 miljarder år sedan bildades bergarter som finns kvar på jorden än i dag. Dock finns inte särskilt mycket sten kvar från den tiden som är intakt. Men på sydvästra Grönland finns berg som är hyfsat välbevarat, och som nyligen har tinat fram från en mycket gammal glaciär. I både fallen handlar det om så kallade stromatoliter. Den frågan kan vetenskapen inte besvara än.

Only Human The amazing ways plants defend themselves - Valentin Hammoudi Our diet largely relies on plants: we use crops to feed ourselves as well as the animals we farm. Microbial diseases and herbivore damages are major factors of crop loss around the world. Reducing these damages represents then an important challenge. Because plants are sessile organisms, meaning they cannot move and run away when threatened, they have developed a range of sophisticated strategies to face attacks from herbivores like ruminants, insects or pests, but also from microbes. By uncovering and understanding how plants can defend themselves against these different attackers, scientists and researchers aim to decrease crop losses. The knowledge of the different mechanisms that are involved in the context of plant defense enables scientists to reinforce plants capacity to defend themselves, using different strategies. For instance, attacked plant cells alert the whole plant using phytohormones and volatiles to prepare for a potential attack.

Experimentskafferiet Gigantiskt fotspår från dinosaurie hittat. 1,75 meter långt | Feber / Vetenskap Ja, de var riktigt stora vissa av de där dinosaurierna. Hur stora är fortfarande, trots en massa uppgrävda skelett, svårt att fatta. Men kanske blir det lite mer verkligt när man kan jämföra sig själv med ett fotavtryck. Ett gäng paleontologer har nämligen hittat vad de hävdar är det största upptäcka fotspåret från en dinosaurie. Det finns i en region i Australien som brukar kallas Australiens Jurassic Park. Steve Salisbury som ledde fältstudien tror att avtrycket kommer från en så kallad Sauropod. Det här stora avtrycket var heller inte det enda som hittades.

Choice Logic and emotion aren't the only forces that guide our decisions. This hour of Radiolab, we turn up the volume on the voices in our heads, and try to make sense of the babble. Forget free will, some important decisions could come down to a steaming cup of coffee. UPDATE: The Williams & Bargh Yale coffee study "Experiencing Physical Warmth Promotes Interpersonal Warmth" was replicated in 2014 by researchers at three different universities, Kenyon College, Michigan State University, and University of Manchester. They did not observe the same results as in the original study.

11 Awesome Science Experiments Your Kids Will Love To Try Life Parenting NEXT PAGE 11 Awesome Science Experiments Your Kids Will Love To Try by erin.c from SciencePrn Page 1 of 4 As a kid, science was never my favorite subject. 1. This experiment doesn't require much in terms of materials, and it's lots of fun. via showtellshare 2. This one isn't very expensive, is relatively easy, and as a bonus, you might get to sneak a few marshmallows. via it'salwaysautumn 3. Another one with a little snack involved! via scienceforkids Did you remember to share this with your friends? Share on Facebook Share on Twitter Trending on the Web Never miss a post! See More by erin.c "Guess what I do for adventure? This Baby Bird Was Found On The Sidewalk. 36 Days Later, You Have To See Her Transformation Recommended Posts Troy's Tickets Contest Week 11! Face It: 15 Animals That Have More Selfie Game Than You 17 Of The Most Relatable Things TV Characters Have Said More Posts in Life He Just Started Out With Some Boxes. 60 Days Later, His Neighbors Love Him. Funny Tech Travel

Hon hittade ett 130 miljoner år gammalt fotspår från dinosaurie Bindi Lee Porth var ute och plockade snäckor på Cable Beach i västra Australien i söndags kväll. Men när hon kände något konstigt under sanden övergav hon snäckplockandet och började i stället ta undan sanden. Då hittade hon något som var bra mycket mer sällsynt än en snäcka. Dolt i sanden fanns nämligen ett 130 miljoner gammalt fotavtryck från en dinosaurie, skriver CNN. – Jag borstade bort sanden och då kom det här vackra fotavtrycket, som från en fågel, fram, berättade hon för ABC News. Hon befann sig på stranden tillsammans med sin dotter och hennes kompis. – Föreställ dig att om det här verkligen är en riktig dinosauries fotavtryck och vi just har hittat de och vi står på något som var här för miljoner och åter miljoner år sedan, sade Bindi Lee Porth till ABC News. Fotavtrycket har ännu inte hunnit undersökas. Men paleontologen Steve Salisbury vid universitetet i Queensland är ändå positivt inställd till fyndet.

The teenage brain | Science News for Students It’s not easy being a teenager. The teen years can play out like a choose-your-own-adventure novel, where everyday temptations lead to tough decisions. What if I took that big jump on my bike? What’s the worst thing that could happen if I snuck out after curfew? Teenagers must act on an endless parade of choices. So what makes the teenager’s brain so complex? The evolved teenager If you have ever thought that the choices teenagers make are all about exploring and pushing limits, you are on to something. For example, laboratory experiments show that young mice stay close by their mothers for safety. As a developmental cognitive neuroscientist, Luna studies those changes that occur in the brain as children develop into adults. Jackpot! What really goes on in a teenager’s brain? Eveline Crone is a psychologist at Leiden University in the Netherlands who studies how the brain develops. A young boy prepares to enter a magnetic resonance imaging (MRI) scanner. Beatriz Luna Tug-of-war B.J.

Neanderthal Skeleton May Shed Light to How Cavemen Feel About the Dead | Science Times Neanderthal Skeleton May Shed Light to How Cavemen Feel About the Dead Staff ReporterFeb 20, 2020 07:31 AM EST Close (Photo : Pixabay/sgrunden)The discovered remains with pollen around it may suggest that Neanderthals bury their dead with compassion by adding symbols like flowers. It's always fascinating to know about the origins of man - what we did before, how we communicated with others, and how we have changed over time. Perhaps this is the reason why we like to explore caves and uncover remains of primitive Neanderthals. Neanderthals are the extinct species of humans like us who lived between 400,000 to 40,000 years ago; where our scientific name is Homo sapiens, theirs is called Homo neanderthalensis. Shanidar's Cave in Iraqi Kurdistan is a famous site because several Neanderthal skeletons have been recovered there since the 1950s. They say that the rodents or human activity could have dragged the pollens there. Everything changed when another skeleton was discovered, named Shanidar.

Common Science Myths That Most People Believe There are a number of old wives’ tales out there regarding some basic scientific principles. Though most of them were refuted years ago, these rumors just won’t go away. Here are some of the top myths floating around out there that just aren’t true: We only use 10% of our brains. It's true that there’s a great deal we don’t know about the brain, but we certainly do know that we use our entire brain. Even if we didn’t have a wealth of data from brain scans to show this 10% figure is completely false (we do), it doesn’t even make sense using basic logic. Additionally, there is no evidence that someone was ever diagnosed with a brain tumor but was told: “Great news! While you might not be using every bit of your brain at all times, but you do use the entire brain over the course of the day. There is a dark side of the moon. Oh, Pink Floyd, how you have led us all astray. From our perspective on Earth, we are able to view about 59% of the moon’s surface (though not all at the same time).

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