They're more than a simple clock, and understanding these cells' activity could ultimately aid in early detection of neurodegenerative diseases. A sense of time is fundamental to how we understand, ...

Educator Ruth Mork teaches kids about clocks — from sundials to cuckoo clocks to roosters. Ruth Mork introduces clocks of all kinds — sundials, candle clocks, hourglasses, cuckoos, even a rooster! She ...

Never have so many parents trembled at the salesman’s glib pitch that knowledge is the key to happiness and that their children will not even find the door without an encyclopedia. Sales of ...