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As a Canadian-Australian, I have always wondered why it is that Australia has so many venomous animals that can kill you while Canada has virtually none.
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But it's not just Australia - it seems like all beautiful, warm places are cursed with venomous native species. So I set out to find the truth: why have all these venomous species evolved in the world's best holiday destinations?
I asked chemists, visited the zoo, interviewed entomologists and snake experts. The answer I found was complicated:
1. The majority of venomous species are ectotherms, cold-blooded creatures whose internal temperatures are governed by their surroundings.
2. This means they have limited periods of activity - mainly while it's warm out, and can only exert short bursts of energy, so they are generally "sit and wait" predators. This may explain why they, more than mammals or birds, evolved venom.
3. It also explains why there are more of these species in warm climates. There are more of all species in warm climates, but this trend is especially pronounced for ectotherms.
4. So there are a greater number of venomous species in warm places, simply because there are more species in warm places. Cold climates still have venomous creatures, like the rattlesnakes of Canada and European vipers.
5. But history also has a role to play. In Australia, there were no snakes until 20 million years ago when a venomous sea snake from Asia encountered the land, sending venomous species to all corners of the continent. Later non-venomous arrivals have done well in the tropics but not as well in Australia's colder climates, so venomous types still dominate there. Hawaii has no venomous land snakes and nor does Jamaica.
6. The recent ice age also would have driven ectotherms from the northern parts of the Northern Hemisphere. This is why there are no snakes in Ireland, for example.
Special thanks to Prof. Rick Shine, Prof. Dieter Hochuli, Prof. Roger Lowe, Prof. Martyn Poliakoff and Taronga Zoo, especially Joe Haddock and Dean Purcell.
Cinematography by Charles Clement
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★Axol x Alex Skrindo - You [NCS Release]
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Episode 3 of ‘The Making of.. Take On Me’ explores the legacy of the song, and will be available to watch on Friday 15th November on YouTube. Did you enjoy Episodes 1 and 2? Revisit the episodes here: http://bit.ly/TheMakingOfTakeOnMe
Produced and Directed by Sorcha Macdonald and Warner Music Entertainment
Project Managed by Katie Graham
Photography by Fritz Johannessen, Henning Kramer Dahl, Just Loomis, Per Arne Skjeggestad, Viggo Bondi
With thanks to… Alan Tarney, Andrew Wickham, Bethany Dawson, Candace Reckinger, Ed Miliband, Ed Sheeran, Harald Wiik, James Blunt, Jamie Carter, Jeff Ayeroff, John Beug, John Hughes, Just Loomis, Magne Furuholmen, Michael Patterson, Morten Harket, Nile Rodgers, Paul Waaktaar-Savoy, Pete Vuckovic, Richard Hughes, Tim Rice-Oxley, Tom McPhee, Tyler Shoemaker, The Savoy Café and Harriet Davis
? Listen to more a-ha here https://lnk.to/ahastrm
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Stay In Touch with Morten Harket…
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The a-ha channel is the official YouTube home of the Norwegian Pop trio a-ha, who achieved global stardom in 1985 when their debut single, “Take On Me” from the album ‘Hunting High And Low’ topped the charts in 36 different countries on its way to becoming one of the best-selling singles of all time, and the 5th most streamed song of the 20th century. a-ha struck chart gold again with “The Sun Always Shines On T.V.” and “Cry Wolf,” and recorded the theme to the 1987 James Bond film “The Living Daylights”. The a-ha YouTube channel is proud to host the music videos from these hits alongside live performance videos, lyric videos, and the solo work of band members Morten Harket (lead vocals), Paul Waaktaar-Savoy (Guitar), and Magne Furuholmen (Keyboards).
En su segundo día en Estados Unidos, el Papa Francisco canonizó a Fray Junípero Serra, conocido como el Padre de California, incluyéndolo así en el libro de los santos.
Más información en: https://www.aciprensa.com/noti....cias/canonizacion-de
ESCUELA de MONSTRUOS BALDI'S BASICS CHALLENGE MINECRAFT ANIMATION - BEBE MILO VIDEO REACCIÓN
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El canal de Bebe milo es para publico infantil. Podrás encontrar canciones infantiles, música infantil para niños y niñas, chicos y chicas. También podrás ver jugar juegos como minecraft gratis, roleplay muy entretenido y en español latino, roblox y mucho mas.
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BEBE MILO EN PROBLEMAS CON DESASTRES NATURALES ? ROBLOX JUEGO SUPER DIVERTIDO
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✅ ISLA VS ISLA: https://goo.gl/euAmDc
✅ BEBE MILO DIMENSIONES: https://goo.gl/rHVcU2
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El canal de Bebe milo es para publico infantil. Podrás encontrar canciones infantiles, música infantil para niños y niñas, chicos y chicas. También podrás ver jugar juegos como minecraft gratis, roleplay muy entretenido y en español latino, roblox y mucho mas.
Lo importante es divertirse y tener lo mejor de minecraft para bebes en 2018!
Scientists are being inspired by nature to design the next generation of security devices. Arrays of nanoscale holes create beautiful reflected colours that are almost impossible to forge. This video was supported by TechNyou - check out their series on logical fallacies: http://bit.ly/WBsD31
Soon these nanoscale security devices could replace holograms. They are many times more reflective than holograms, and although the structures are smaller scale, they are lower aspect ratio and therefore easy to manufacture in bulk.
The electron wiggle simulation is from PhET, the best physics simulations ever: http://phet.colorado.edu
Special thanks to Thomas from Copenhagen who showed me around the city including the science museum where he assisted with the soap bubble demonstration.
Clint Landrock is the Chief Technology Officer for Nanotech Securities: http://www.nanosecurity.ca
Music is "Firefly in a Fairytale" by Gareth Coker
Available with Symphony Orchestra, Wind Orchestra and Brass Band, David Childs & Chris Williams perform the Piano version of the finale from Karl Jenkins' Euphonium Concerto. This together with more performances from David Childs can be seen on his World of Brass DVD: Masterclass in Brass
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It takes the moon about 27 days to orbit the Earth. What makes it go round? It is the gravitational attraction of the Earth on the moon. Due to the moon's velocity, the Earth keeps pulling the moon towards it without the moon actually getting closer to the Earth. This is similar to how satellites orbit the Earth.
El Papa Francisco celebró la Misa Solemne de clausura del Sínodo de los Obispos para la Amazonía este domingo 27 de octubre en la Basílica de San Pedro.
Más información en: https://www.aciprensa.com/noti....cias/homilia-del-pap
El director del Grupo ACI, Alejandro Bermúdez, nos ofrece a diario reflexiones en audio y vídeo sobre temas de actualidad en los que los católicos necesitamos tener una posición clara e informada. Compártelo con tus amigos, tu comunidad o en tu medio de comunicación católico.
¡Oh la la! Nancy tiene 4 palabras favoritas en francés para compartir contigo. ¿Quieres saber cómo se dice "hola", "mariposa" "bocadillos" y "después de usted" en francés? Mira Fancy Nancy Clancy en Disney Junior.
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Los adolescentes son “máquinas de aprendizaje” sostiene la neurocientífica Frances Jensen. En su último libro, “El cerebro adolescente”, la neuróloga recoge también su experiencia como madre de dos adolescentes. “Decidí escribirlo cuando me di cuenta de que tenía un experimento en casa”, asegura. En su trabajo Jensen recurre a la experiencia clínica y a las investigaciones recientes para demostrar que en la adolescencia el cerebro aún no ha alcanzado la madurez. Desde una posición única como neuróloga, madre y conferenciante, ofrece una mirada revolucionaria a la etapa adolescente, disipando mitos y ofreciendo consejos prácticos para jóvenes, padres y maestros.
Jensen ha investigado el desarrollo cerebral desde el período neonatal hasta la edad adulta. Actualmente es jefa del departamento de Neurología de la Universidad de Pensilvania. Ha sido profesora de neurología en la Escuela de Medicina de Harvard, directora de neurociencia traslacional y directora de investigación de la epilepsia en el Hospital de niños de Boston. Es autora de más de cien trabajos relacionados con la investigación sobre el desarrollo cerebral adolescente.
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The definitive answer about the direction water swirls in two hemispheres
Sync the videos yourself: http://toiletswirl.com
For the record Destin and I repeated the experiment 3-4 times each in each hemisphere and got the same results every time.
The idea that water going down a drain or flushed down a toilet swirls in opposite directions in the Northern and Southern Hemispheres has a long history. But few have ever done the experiment. Destin from Smarter Every Day and I performed identical experiments in the Northern and Southern hemispheres. What we found is the direction of water swirl in a toilet, sink, or bathtub is determined by other sources of angular momentum. However if the body of water is big enough, e.g. a kiddy pool, and left still for long enough (at least 24 hours), then the Coriolis effect is observable with water swirling counterclockwise in the Northern hemisphere and clockwise in the Southern hemisphere.
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Gordon McGladdery did all of the sound design for the video. We used two songs from other artists (licensed of course). Derek split the first one up so it fades from video to video, and Gordon split the instruments up on the second one. There are violins on one video and percussion on the other for example. It's really neat.
The neat earth animation at the beginning and the synchronizing timer was made by http://eisenfeuer.com/. He also made still images of the earth from the top and the bottom.
Thanks to Vanessa for filming in Sydney: http://youtube.com/braincraftvideo
MORE INFO:
There was a study performed at MIT years ago (http://web.mit.edu/hml/ncfmf/09VOR.pdf) that explained the physics involved. We repeated some of these demonstrations, but on opposite sides of the globe…and in a way that can be easily understood.
This site is a great resource on the Coriolis effect and ways people have gotten it wrong:
http://www.ems.psu.edu/~fraser/Bad/Ba...
¿Quieres viajar a Encantia para vivir un momento lleno de magia, aventuras y música junto a Sofía? Sigue mirando Princesita Sofía en Disney Junior.
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La Virgen de la Medalla Milagrosa, cuya fiesta es el 27 de noviembre, le pidió a Santa Catalina Labouré que realizara una medalla según lo que presenció durante la aparición y, por ello, este objeto cuenta con varios detalles que ayudan a entender su real significado.
Encuentra la nota completa en:
http://ow.ly/EaCv30mKTpr
