This one is interesting - a blog with rotating hosts! The new blog, Photo Synthesis will rotate authors every month, each author using the blog to showcase some of their best science/nature photography.
The first one to go is Alex Wild, who you may also know from his Myrmecos Blog. So go say Hello and check out the pictures!
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MarkCC has a post about quaternions and the fact that they can be used for rotation, so I thought I'd chime in with exactly how they represent rotations.
So, last time, we looked at simple substitution ciphers. In a substitution
cipher, you take each letter, and pick a replacement for it. To encrypt a
message, you just substitute the replacement for each instance of each letter.
A number of studies have found that older adults a