Under en världsomsegling insåg Charles Darwin hur livet på jorden hade utvecklats. Hans teori om evolutionen var lika enkel som genial, men kastade samtidigt Bibelns skapelseberättelse över ända och mötte hårt motstånd. Text: Anna Larsdotter I augusti 1831 fick Charles Darwin ett brev som skulle förändra hans liv. Avsändare var hans vän John Stevens Henslow, professor i botanik i Cambridge. I brevet frågade Henslow om Darwin ville följa med på en forskningsseglats runt jorden. Så gav sig Charles Robert Darwin den 27 december 1831 av på sitt livs resa. Darwin växte upp med en äldre bror och fyra systrar. Charles Darwin var inte av riktigt samma skrot och korn som sin far och farfar. Han hade lärt sig att stoppa upp djur och byggt upp en imponerande samling skalbaggar. Darwin fascinerades av de arter han hittade på ögruppen. Darwins anteckningar från resan med Beagle var fyllda av entusiastiska utrop. Detta var inte sant, insåg Darwin. Nu blev det bråttom.
ExperimentskafferietCharles Darwin10 Word Cloud Generators You Have Probably Never TriedA few days back, we looked at five great ways to incorporate word cloud generators into your classroom. There are obviously many more uses out there for them – but that is a discussion for another post. We’ve mentioned most of these before – in a post from way back when – so I won’t go into too much detail about each individual one, but we’ve added a few notable ones to the list. (Of note, the list is in no particular order). The vast majority of them work the same: plug your text into the box, select a few options, and you’ve got yourself a word cloud. If you do a quick search for word cloud, you’ll see so many different types. Do you have a favorite word cloud generator from the list below? Wordle Jason Davies’ Word Cloud Generator WordSift WordItOut Tagul TagCrowd Yippy WordMosaic AbcYa Tagxedo VocabGrabber
Cell ModelsFor life all cells have basic needs. Cells have diverged in their structure and function to accommodate these survival requirements. Here are some KEY TERMS to help you think, explore and search for similarities and significant differences that have become the characteristics of eukaryote (animal, plant) and prokaryotic (bacteria) cells. Reproduction / cell division Energy trapping, storage and consumption Form / shape / structure Cell specialization Compartmentalization of cell functions Communication within and beyond the cell Cell / organism survivalPowToon, free business presentation software animated video maker and PowerPoint alternativeHunt for alien spacecraft begins, as planet-spotting scientist Geoff Marcy gets fundingArtist rendering of alien spaceship Photo: Ray Edgar In the field of planet hunting, Geoff Marcy is a star. After all, the astronomer at the University of California at Berkeley found nearly three-quarters of the first 100 planets discovered outside our solar system. But with the hobbled planet-hunting Kepler telescope having just about reached the end of its useful life and reams of data from the mission still left uninvestigated, Marcy began looking in June for more than just new planets. He's sifting through the data to find alien spacecraft passing in front of distant stars. He's not kidding - and now he has the funding to do it. If intelligent life is common in the galaxy, "where is everybody?" Last fall, the Templeton Foundation, a philanthropic organisation dedicated to investigating what it calls the "big questions" - which, unsurprisingly, include "Are we alone?" What astronomer Geoff Marcy doesn't hope to find: A Death Star Photo: Wookieepedia Advertisement Successful so far
Download free PowerPoint backgrounds and templates - Brainy BettyDNA from the Beginning - An animated primer of 75 experiments that made modern genetics.5 Ways for Students to Showcase Their Best WorkAs I do every year, I am taking this week to relax, recharge, and ski with friends. While I'm away I will be re-running the most popular posts of the year. This was the second most popular post in April, 2014. As the end of the school year approaches you may be looking for a good way for students to organize and share examples of their best work of the school year. Page O Rama is a free service for quickly creating stand alone webpages. Dropr is a free service for creating portfolios of your images, videos, and audio files. Populr is a service for creating simple webpages to showcase an example or two of your best work. About.me is a good tool for students to use to create a digital resume to share as part of a college admissions application or an internship application. Tackk is a free service that was featured last week on Free Technology for Teachers.