SpaceX often fails to meet its deadlines, too. The company’s Falcon Heavy was originally supposed to debut in 2013 or 2014, but its launch has been repeatedly pushed back. (The first flight is supposed to come this year.) And SpaceX says it will launch people on the Crew Dragon for the first time in 2018, but a recent report from the Government Accountability Office suggests Crew Dragon won’t be certified to carry people until 2019. Since SpaceX will only do its Moon mission after the vehicle is certified, its current timeline may be overly ambitious. … [Read more...] about With its Moon announcement, did SpaceX kick off the first public-private space race?
Love SignWeighing in at 10 ounces, the blood-filled muscle called the heart has become the universal symbol of love. The Greeks believed the heart was the seat of the spirit, the Chinese associated it with the center for happiness and the Egyptians thought the emotions and intellect arose from the heart. No one is sure the exact origin of the love association, however. One idea is that the heart got its "love mark" in the ancient Greek city of Cyrene, now in modern-day Libya. The colony was known for a plant called Silphium, with heart-shaped seed pods. Silphium had medicinal properties, and possibly also was used as an herbal contraceptive. … [Read more...] about Top 10 amazing facts about your heart