Aids 101 National Geographic

Summary

About 37 million people around the world are currently living with What is plague? How many people died from the Black Death and the other plague pandemics? Learn about the bacterium ... Ebola is a rare, but extremely dangerous disease. Find out how many strains of Ebola exist, how the Ebola virus attacks its host, ... While customs and traditions involving pregnancy vary worldwide, the developmental process is essentially universal. Find out ... The influenza virus is an recurring nightmare, killing thousands of people each year. Learn how the virus attacks its host, why it's ... Extremophiles are organisms that can live in exceptionally harsh environments. Find out about the different types of extremophiles ... What is cancer, and how does it start? Find out how genetics play a role, which types of cancer are the most prevalent, and what is ... How does the human body work? What roles do the digestive, reproductive, and other systems play? Learn about human ... El ébola es una enfermedad rara, pero muy peligrosa. Descubre cuántas cepas de ébola existen, cómo ataca el virus del Ébola al ... The story of human evolution began about 7 million years ago, when the lineages that lead to Homo sapiens and chimpanzees ... The lungs replenish the body with life-giving oxygen. Learn about the anatomy of the lungs, how the organs make respiration ...