It's the beginning of another week and here are some the excellent things I saw shared on Twitter today. If you have something that you found on Twitter and would like to share, please leave a comment.1. NASA Uncovers Secrets of the Northern Lights from @tbateson
2. Ten Ways To Be Useful on Twitter from @the_seagull
3. Prescription Drug Abuse: Not In My House from @chollingsworth
4. Best Embeds for Educational Wikis and Blogs from @Mrs_Smoke
5. Are E-Book Real Books Yet? from @ralphmercer
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