The winter solstice is today, when the northern hemisphere marks its shortest day length and longest night length. (It’s the summer solstice in the southern hemisphere.) Of course, the Earth doesn’t actually tilt on its axis, it’s just reached that part of its annual journey around the sun where the northern hemisphere is tilted...
Last week, I talked a little bit about several times during our lifespan, called critical periods, where we are particularly sensitive to input from our environment. Input like light and eye muscle input to the eyes when we are developing our depth perception in early childhood. Input like hormones and other signal chemicals coming...
