Brainy stuff starts at 15:40 and Behind the Redwood Curtain begins at 26:55.
Catherine finds a patterns for her Great Adirondack yarn from 50 Fabulous Borders by Rita Weiss.  She also finished a jelly fish from Hansi Singh's Amigurumi Knits.
Margaret has been making washcloths from Stitch Diva's (Jennifer Hansen') pattern and loving the Lucci DK cotton tape yarn.
Catherine relates some research suggesting the knitting and other acitivities reduce the chances of dementia and age-related Alzheimer's.   The evidence is anecdotal and researchs say they need more research before they can find a causal link.
Margaret talks about the Humboldt Bay National Wildlife Refuge.  She also offers a tip to suggest you can sketch out a graph on a challenging knit or crochet pattern that doesn't have one.