Features the most insightful and informative videos on all areas of the sciences, history, philosophy, and the arts, with an additional focus on the values of Humanism, Freethought and methodological Skepticism.
If there are any freely available programs or shows which you know of that I missed, please let me know about them.
Onions Make Us Cry
Have you ever wondered why cutting into an onion can make you cry? You are about to know.
Paul Andersen explains how energy can be transferred from one system to another. In a closed system the energy can be transferred as either work or heat. Thermal energy transfer is know as energy transfer through heat. During energy transfer the energy of the entire system is conserved.
via Bozeman Science.
Why is All Sand the Same?
Note: “ortoclase” at 0:59 should be “orthoclase”
MinuteEarth provides an energetic and entertaining view of trends in earth’s environment — in just a few minutes!
Created by Henry Reich
Video Concept and Writing: Meg Rosenburg
Writing and Editing Team: Alex Reich, Peter Reich, Emily Elert
Animation: Ever Salazar
Music: Nathaniel Schroeder: http://www.soundcloud.com/drschroeder
Light Can Draw on Liquid
Researchers have manufactured photo-chemically active polymers that can be dissolved in water or certain alcohols. When exposed to light, the polymer dissolves completely and leaves a clear form that is visible in the cloudy solution.
Source: Univ. of Helsinki
via Lab Equipment.
VX GAS: Nicolas Cage’s Worst Nightmare
Fans of the movie “The Rock” may already be familiar with VX Gas. It was the poisonous chemical in those fragile green balls and it would have killed everyone in San Francisco. Watch and find out what would have happened if Nicolas Cage wasn’t there to save the day. Losers won’t watch.
Diatom algae populations tell a story about climate change in Greenland
With support from the National Science Foundation (NSF), lake ecologist Jasmine Saros and her team from the University of Maine are plying the lake waters of southwestern Greenland, gathering samples of “diatoms” to study how climate change is affecting this Arctic ecosystem. Diatoms are a type of algae that responds rapidly to environmental change and leaves a fossil in lake sediments.
Striking changes in communities of diatoms have occurred over the last 150 years. Diatom species generally associated with warmer conditions are increasing at unprecedented rates in the sediment record.
However, changes in diatom assemblages in lake sediments from west Greenland are different from those in the rest of the Arctic in that they are already rich in these ‘warmer’ water diatoms throughout the Holocene (the last 11,700 years of geologic time). This difference has raised questions about what diatoms can tell us about environmental change in the Arctic, and suggests the need to clarify the ecological traits of diatoms in order to advance our understanding of drivers of change.
Recent research in alpine regions reveals that key diatom species that are used as indicators of 20th century warming in both arctic and alpine lakes respond specifically to both climate-induced changes in energy (mixing depths) and mass inputs (nutrients) to lake ecosystems. This suggests that spatially- and temporally-variable interactions between climate-induced changes in the physical and chemical structure of lakes may drive diatom community changes, but this is currently untested in arctic lakes.
This research couples comparative lake sampling with both small- and large-scale experiments to provide key ecological information that will enable interpretation of climate-induced ecological changes from several existing diatom records from southwest Greenland. The objective of this project is to determine the effects of climate-driven changes in nutrients and water column stability on the relative abundances of key diatom species, and to apply that information to existing diatom records to determine climate-induced changes in these lake ecosystems.
The research in this episode was supported by NSF award #1203434, an Arctic System Science program award for “Deciphering the ecology of key diatom taxa to understand climate-induced changes in West Greenland lakes.”
Miles O’Brien, Science Nation Correspondent
Kate Tobin, Science Nation Producer
via Videos at NSF.
Networking: A Chemist’s Story
Chemical & Engineering News follows graduate student Fred Nytko for six months as he grows his network. Will it help him find a job?
Make a wax volcano | Shot on Mount Etna | Live Experiments with Huw James
Huw James took a trek up Mount Etna and decided to show us what actually happens when a volcano erupts!
With a little bit of help from Dr Suze Kundu and using a simple demonstration heating a glass beaker of wax, stone, sand and water we can see what happens when a volcano erupts.
We can actually tell a lot about a volcano looking at the lava that comes out. If the lava is quite dense and thick we know it contains a lot of the compound silica. If it is less dense it has less silica and spreads out a lot more.
Thick lava will generally erupt from one vent and follow one flow down the side of the volcano. Thinner lava, lava that is less dense, generally erupts from the surrounding magma chambers and flows in many different channels.
Did you know that Mount Etna erupted recently? Check out this amazing video from BBC News! http://www.bbc.co.uk/news/world-europe-24980153
via Head Squeeze.
Paul Andersen explains how energy can be transferred from warmer objects to colder objects through heat. Temperature is a measure of the average kinetic energy of the particles in a substance. When two objects are in contact collisions between the particles will transfer energy from the warmer object in the form of heat.
via Bozeman Science.
Ocean Acidification: The Other Carbon Dioxide Threat
When carbon dioxide is absorbed by the ocean, the water’s acid level rises. If this level gets too high, some sea creatures that build protective shells can’t grow as fast or even have their shells dissolve, threatening the entire food chain.
via Live Science Videos.
Deadly Nightshade: The X-Rated Witch Poison
Deadly Nightshade has been used as a medicine, a deadly weapon, and witches would use it as a hallucinogen. They didn’t take it orally. Witches would take a CENSORED and CENSORED up their CENSORED until the poison kicked in. It was pretty CENSORED hot, you perverts.
Bite Sci-zed - Could we photosynthesize?
All Elysia timida images Public Domain, found on Wikimedia Commons, author Parent Géry
Journal of Cell Science Paper:
Paul Andersen explains how the temperature is a measure of the average kinetic energy of particles in an object. The temperature is proportional to the average kinetic energy according to the Kelvin scale. At absolute zero there is no molecular motion and it is at 0K. The Maxwell-Boltzman distribution can be used to measure the average kinetic energy of the particles in a specific example.
via Bozeman Science.
How Do You Create “Fog”?
There are a few methods for creating “fog,” including glycerine-based fog juice as well as dry ice. Check out this episode of BrainStuff to learn how to “fog” up your Halloween party.
5 Tips for a Better Thanksgiving through Chemistry
Thanksgiving is a holiday packed with cherished family traditions. But there’s always room to experiment, right? Our latest video features five tips for a better Thanksgiving through chemistry. Check out the video to see the secret of turkey brining explained, the best way to make seitan — a.k.a. mock duck or “wheat meat” — or to find out whether cranberries are packed with more antioxidants in their raw form or as a canned sauce.
via Bytesize Science.