The Jewish calendar is based on two principles. It is both a lunar calendar, based on the time it takes for the moon to go around the earth, and a solar calendar, based on the time it takes for the earth to revolve around the sun. We lear...
One of the exciting areas of development in recent years is bio-agricultural engineering. Several companies are working on manufactured meat that, rather than deriving from the flesh of animals, is grown in petri dishes from animal cells....
New digital technology has had a huge impact on our lives. No area has been unaffected. We order things online and read e-books. Our smart houses turn on the lights when they sense us arrive; doors lock themselves when we leave. If these ...
