The Helix Bridge: Marina Bay, Singapore. Clever, beautiful and inspiring. Singapore's double helix bridge is 280 meters long, made of a special stainless steel, lovingly assembled over two years with great precision.Despite being just two years old is already being touted as an architectural marvel and engineering feat.ingapore's double helix bridge is 280 meters long, made of a special stainless steel, lovingly assembled over two years with great precision. Despite being just two years old is already being touted as an architectural marvel and engineering feat.
Watermelons are native to the Kalahari Desert of southern Africa. The first recorded watermelon crop was found in Egypt, as it was depicted in hieroglyphics on tomb walls dating back as far as 3000 Being held in such high regard, watermelons were left as food to nourish the dead in the afterlife.
Seedless watermelons--sweet inside but without the numerous seeds found in conventional watermelons--are the ultimate in convenience foods. Seed Production. The obvious question asked about growing seedless watermelons is: How does one obtain seed of a seedless watermelon? Obviously, you cannot save seed from a seedless watermelon. So, where do the seeds come from? Simply stated, the number of chromosomes (the threadlike bodies within cells that contain the inheritance units called genes) in a normal watermelon plant is doubled by the use of the chemical colchicine. Doubling a normal (diploid) watermelon results in a tetraploid plant (one ...