A group of scientists from California and China released a new study this past week that explains why Earth has remained habitable despite natural events that have robbed other planets in our solar system of their ability to host and sustain life.  We’ll hear from the lead author of this study. And… As honey bees continue to mysteriously disappear one US government biologist is doing his part in trying to photograph as many bee species as possible before some become extinct.   We’ll hear how an obesity specialist is coming to the aid of an eight month old boy from Colombia who weighs over 20 kilograms, which is three times heavier than an average child of that age.   There’s big health news this past week for those living in developing countries.  Scientists have developed a revolutionary nanovaccine that does not require refrigeration or booster shots.   We have these stories and more coming your way on VOA's science, health and technology magazine, "Science World."