Role and Importance of Data in Public Health. Address the basic concepts, methods, and tools of public health data collection, use, and analysis and why evidence-based approaches are an essential part of public health practice.
Every language in the world-from English to Mandarin-evolved from a prehistoric 'mother tongue' first spoken in Africa tens of thousands of years ago, a new study reveals.
We do not know. That's really the best answer I can give you. Language is around 100,000 years old, and the furthest we have been able to trace back any language is about 20,000 years. In any case, there's not really any meaningful way to claim that any currently spoken language was the first.