Dr. Jason Karlawish is a professor of medicine at the University of Pennsylvania. He says the most significant breakthrough in Alzheimer's research is that doctors no longer have to wait until after a patient has died to diagnose the disease.
At night, in the ocean, they look like little Broadway billboards with dazzling trills of rainbow colored light. They have eight little runways on their bodies for light display. What are they?
They're called comb jellies. They're not jellyfish. They don't pulse like jellies. They seem to hang. You can find them bobbing off eastern beaches from Massachusetts to the Carolinas and if you pull them up (you can, they don't sting), they're goopy, gelatinous clumps vaguely shaped like walnuts.