CNN reports that Stony Brook University researchers recently looked at the brain scans of couples that had spent 20 years together and found 10% of them had brain scans similar to the scans of people who have just fallen in love.
Using brain scans, researchers at Stony Brook University in New York have discovered a small number of couples respond with as much passion after 20 years together as most people only do during the early throes of romance, Britain's Sunday Times newspaper reported.
The researchers scanned the brains of couples together for 20 years and compared them with results from new lovers, the Sunday Times said.
About 10 percent of the mature couples had the same chemical reactions when shown photographs of their loved ones as those just starting out.
The evidence somewhat contradicts earlier studies that found romantic love fades completely after 10 years. In this case it still faded for 90% of those studied, which seems like quite a bit.
CNN 
