How do new languages form?

The two types of plains are coastal plains and lowland plains

Explain the value of statistics and other data to positive economics and to normative economics

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed