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.
Water lettuce is a free-floating aquatic plant whose origins are uncertain. An explorer in 18 th century Florida was the first person to record its presence in North America. Some experts believe it is native to the southeastern United States, while others believe it came from Africa, southern Asia or South America.ater lettuce is a prohibited plant in Florida, Louisiana, Mississippi and Texas, and is considered a noxious weed in South Carolina and Delaware. Water lettuce forms large, dense floating mats. The plant can adapt to life in ponds, lakes and quiet areas of rivers and streams, but cannot withstand salt water.