Humpback whale swallows kayaker off Chile before releasing him ...

Learn how to identify a male and female tree swallow. Find out about their nests, song, range map and what tree swallows eat.

Takashi Oguchi, a geographer from the University of Tokyo, said sinkholes are rare in Japan, where most roads are built on unconsolidated fluvial and marine sediments. But he warned that when a ...