An alternative to dredging aims to capture moving sand to protect the archipelago from erosion and rising seas.

Beneath the surface of the Southern Ocean, vast volumes of cold, dense water plunge off the Antarctic continental shelf, cascading down underwater cliffs to the ocean floor thousands of meters below.

After a soggy start to the day, we’ll see big afternoon improvements. Clouds will linger for a good part of the morning in Boston as clearing skies inch from west to east. The afternoon will turn ...