A Crucial Part of The Brain's Memory Center Seems to Shrink in People With Depression
It's long been known that depression has links to dementia and also specifically to Alzheimer's disease, but exactly how depression and cognitive decline may interact with one another remains unexplained.

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These tiny drones are powered by sound: Engineers have designed acoustic cavities that convert sound waves into thrust, propelling small robots and ultralight aerial vehicles without on-board actuator






