This could
happen at any age past 4 months.
Not exact matches
At this
age, your child will be able to anticipate what will
happen next based on
past experience.
There have been several such transitions in the
past, but one of the largest and most dramatic transitions
happened at the end of the last Ice
Age.
The average temperature increase is real and the effects are
happening much more rapidly than anything seen in the
past 2000 years
at a minimum and probably since the last ice
age around 12000 years ago.