the most powerful:
People are surprisingly bad at estimating the size and distance of an object in an empty sky.
Keep reading — tap the button below to continue.
Keep reading — tap the button below to continue.Imagine holding a small coin at arm’s length.
Depending on the distance and angle, it can appear to cover part of a much larger object behind it.
The same basic principle applies to birds. Booka Safari
Without a familiar object beside the bird, there is no reliable reference point.
A
