Once every 48-50 years, a rare bamboo flower bloom in India’s northeast sparks an unexpected crisis. This natural phenomenon, ...

Blooms from this abundant plant occur about every 50 years. Here's why it causes a rat flood and, ultimately, famine in certain regions of the world.

Square bamboo is a rare plant found only in China, 43 percent of which grows in Chongqing Municipality. Photos: VCG ...