If you are going on holidays don’t forget science will go with you whenever you are! Why do some drinks sweat? When it’s hot outside and you are drinking in a terrace you just have to wait 5 minutes to feel that the glass is wet on the outside. Tiny drops of moisture have formed on the outside of the glass like the sweat on your forehead. You knew it was hot out, but is your glass really sweating? Not quite! It may look like sweat, but that’s water on the outside of your glass. But how did it get there? Did it just magically appear out of thin air? Actually, it did come right out of the air, but there’s nothing magical about it. It’s all science! The scientific name for what happened is condensation. Whether...
Since its earliest days, science has been associated with war. The inventors Archimedes and Leonardo turned their talents to the problems of fighting. If I ask you what technological advances we owe to war (and cold war) you would probably think of all kind of weapons, tanks, planes or even nuclear bombs. But there are some inventions with a military background that you didn’t know. Until know. Sanitary Napkins Everybody get shock the first time they know something as girly as sanitary napkins was originate during an arm conflict when war is so a masculine thing. But you will understand it as soon as you think how massive wounds can be on battlefield. It’s logical that the most effective bandage were develop in order to help the soldiers. The girls started taking advantage of the invention when...
HAZ CLICK AQUÍ PARA VER EN ESPAÑOL There are plenty of curious scientific facts outside in the middle of the summer when it’s warm and sunny. We are so surrounded of so much science you look at without giving it a think. How does sunscreen work? In every sunscreen bottle you will find the acronym SPF followed by a number. SPF stands for Sun Protection Factor and indicates how long it will take for UVB rays to redden skin when using a sunscreen, compared to how long skin would take to redden without the product. For example, an SPF of 15 would allow you to stay in the sun 15 times longer than you could without protection. So, if your skin starts to redden in 20 minutes without sun block, applying a product with SPF 15 increases that...
Si te pregunto qué avances tecnológicos le debemos a la guerra probablemente pensarás en todo tipo de armas, tanques, aviones e incluso bombas nucleares. Pero hay unos cuantos avances científicos que no sabías que se produjeron con fines militares. Las compresas Todo el mundo se sorprende cuando descubren que algo tan fememino como las compresas tiene su origen en algo tan masculino como un conflicto armado. Pero tiene lógica si nos paramos a pensar en lo mucho que llegan a sangrar las heridas en el campo de batalla. Es por esto que se desarrollaron vendajes mucho más efectivos que más tarde serían utilizados por las chicas, siendo las primeras en darle esta utilidad unas enfermeras francesas. ...
CLICK TO READ IN ENGLISH En verano nos rodea un montón de ciencia a la que no les prestamos atención ¿Cómo funciona la crema para el sol? En cualquier bote de crema para el sol podemos encontrar las letras SPF seguidas de un número. El SPF es el factor de protección y las siglas vienen del inglés “Sun Protection Factor”. Este número te indica cuanto tiempo necesitan los rayos UVB para empezar a quemar tu piel en comparación con el que necesitarían sin el producto. Por eso, una crema con un SPF de 15 te permite estar en el sol 15 veces más que sin ella. De modo que si cuando no usas protección tu piel se empieza a enrojecer a los 20 minutos, aplicando la crema podrías estar 300 minutos antes de que te sucediera. Eso...
