
The SciencesOctober 1, 1982
Tidal Bores
A bore is the hydraulic analogue ofa sonic boom: a moving wall of water that carries the tide up some rivers that empty into the sea. For several hours after it passes the river rows upstream

Tidal Bores
A bore is the hydraulic analogue ofa sonic boom: a moving wall of water that carries the tide up some rivers that empty into the sea. For several hours after it passes the river rows upstream

Atmospheric Halos
Rings around the sun and moon and related apparitions in the sky are caused by myriad crystals of ice. Precisely how they are formed is still a challenge to modern physics