Wondering if those Black Friday sales are a real deal? You can check 
the price history of items sold on Amazon by using the website 
camelcamelcamel.com. And the ShopSavvy smartphone app lets you scan 
barcodes on store items to compare prices from dozens of other retailers
 and online sellers. Source Link
  
Friendly
 competition may work better than simple encouragement to get you back 
into the gym. A study using Facebook groups showed better results when 
members challenged each other to raise their performance. Supportive 
groups can backfire because they draw attention to members who are less 
active and create a downward spiral of participation. Source Link
 
Researchers
 think they may have a nose for finding who’s at higher risk for 
Alzheimer’s disease. Testing showed that older people with a reduced 
sense of smell could be at increased risk of Alzheimer's. Brain circuits
 that process smells can be affected by Alzheimer's and studies have 
shown that people with the disease are less able to identify odors. Source Link
