यदि आप इस वीडियो को नहीं देख सकते हैं, तो आपका ब्राउज़र एचटीएमएल 5 वीडियो का समर्थन नहीं करता है
To view this video please enable JavaScript, and consider upgrading to a web browser thatsupports HTML5 video
The Era of #Depopulation… What does that look like in our daily lives? About wars, (natural?) disasters, famine & drought, plagues & diseases. The true story behind HIV/AIDS and the Spanish Flu.