Science Friday
To find out how blood affects aging, scientists can surgically connect two animals and let blood circulate between them. Give a dollar for every Friday! Thank you for helping us continue making science fun for everyone. Science Friday® is produced by the Science Friday Initiative, a 501 (c) (3) nonprofit organization.
How Sexual Intercourse Was Invented, 385 Million Years Ago
Jun 3, 2022 · Our oldest evidence of penetrative intercourse is about 385 million years old and comes in the form of fossilized remains of the way too aptly named Microbrachius dicki. I know. I know! But believe it or not, M. dicki got its rather pointed moniker from Scottish baker-turned-botanist Robert Dick in the nineteenth century. Mr.
The Origin Of The Word ‘Cell’ - Science Friday
Aug 7, 2018 · Etymology. One day, the British scientist and “natural philosopher” Robert Hooke bent over a microscope that he’d constructed himself. He’d studied plenty of objects under the microscope before—the tip of a needle, a printed dot, snowflakes—but when he sketched and named this particular observation, he would take a word previously ...
Untangling The Long-Armed Mystery Of The Bigfin Squid
Jun 24, 2021 · In the two decades since, the “mystery squid” has been identified and given a scientific name, Magnapinna, better known as the bigfin squid. But its elbowed, slender arms and unearthly visage have also attracted other nicknames, like the “ long-arm squid ” and “ daddy long legs of the ocean,” and recently “ ghost of the sea,” as …
Gravity And Centripetal Force In Our Solar System - Science Friday
Oct 21, 2022 · Every planet in the solar system is affected by multiple forces. The gravity of the Sun pulls planets toward the center of the solar system. The inertia from the creation of the planets sent them flying in a straight line, perpendicular to the force of the Sun’s gravity. When these forces combine, they result in centripetal forces that push our planets in their circular motion around the Sun.
The Oozy Physics Of Oobleck - Science Friday
Dec 15, 2023 · This kind of material is called an oobleck, and it’s a type of non-Newtonian fluid, meaning its viscosity changes under pressure or stress. Oobleck-like materials include human-made things like Silly Putty and paint, but are also found in nature; blood and quicksand are both non-Newtonian fluids. For a long time, it’s been hard to prove ...
Why Is It So Hard To Agree On When Human Life Starts? - Science …
Sep 2, 2022 · The Supreme Court’s 1973 decision in Roe v. Wade that established a constitutional right to abortion did not define a moment when life begins. The opinion, written by Justice Harry Blackmun, observed that the Constitution does not provide a definition of “person,” though it extends protections to those born or naturalized in the U.S.
The Science Behind Cryptid Sightings - Science Friday
Oct 29, 2021 · This segment is part of the Spine-Chilling Science spotlight. People around the world have long been fascinated by the idea that there are strange creatures out there, ones that may or may not exist. Tales circulate about cryptids–animals whose existence can’t be proved—like Bigfoot hiding out in American forests, or sea serpents lurking ...
Where Does The Sand On Our Beaches Come From? - Science Friday
Jul 29, 2021 · The Sands Of Earth, And Beyond. Sand from Isla Chora on the Pacific coast of the Nicoya Peninsula, Costa Rica. This beach sand is derived from stream and marine erosion. Under the microscope, you can better see barnacles shards, bivalve shell fragments, and flecks of porphyritic basalt. Credit: Robert Maronpot/Magnified Sand.
How Five Elements Define Life On Earth - Science Friday
Nov 3, 2023 · Credit: Shutterstock with added elements. Over 99% of a human cell is made up of just five elements: carbon, hydrogen, oxygen, nitrogen, and phosphorus. That same elemental mix exists, with minor variations, in every other living thing on Earth. In his new book, Elemental: How Five Elements Changed Earth’s Past and Will Shape Our Future ...