As Halloween approaches I'm sure we will see lots of articles like the one I saw on Yahoo this week. I've cut-and-paste a few excerpts that might spark a few comments. Here's one:
"Using science and math, Efthimiou explains why it is ghosts can't walk among us while also gliding through walls, like Patrick Swayze in the movie "Ghost." That violates Newton's law of action and reaction. If ghosts walk, their feet apply force to the floor, but if they go through walls they are without substance, the professor says.
"So which is it? Are ghosts material or material-less?" he asks."
He didn't comment on the possibility that they may not actually touch the floor.
Another interesting tidbit was:
"More than 1 in 3 Americans believe houses can be haunted, a 2005 Gallup poll showed. More than 20 percent of Americans believe in witches and that people can communicate with the dead. TV shows such as "Medium" and "Ghost Whisperer" are popular."
I bet that's why there are so many paranormal groups springing up.