A solar-powered airplane finished crossing the United States on Saturday, landing in New York City after flying over the Statue of Liberty during its historic bid to circle the globe, the project team said. The spindly, single-seat experimental aircraft, dubbed Solar Impulse 2, arrived at New York's John F. Kennedy International Airport at about 4 a.m. local time after it took off about five hours beforehand at Lehigh Valley International Airport in Pennsylvania, the team reported on the airplane's website. Such a pleasure to land in New York! For the 14th time we celebrate sustainability," said the project's co-founder Andre Borschberg on Twitter after flying over the city and the Statue of Liberty during the 14th leg of the trip around the globe. The Swiss team flying the aircraft in a campaign to build support for clean energy technologies hopes eventually to complete its circumnavigation in Abu Dhabi, where the journey began in March 2015. The solar cr...
The King's College London team says leg power is a useful marker of whether someone is getting enough exercise to help keep their mind in good shape. Exercise releases chemicals in the body that may boost elderly brains, say the scientists, in the journal Gerontology. But they say more research is needed to prove their hunch.It is difficult to untangle leg strength from other lifestyle factors that may have an impact on brain health and the study did not look specifically at dementia, experts say.The researchers tracked the health of more than 150 pairs of twin sisters aged between 43 and 73 at the start of the study. Leg power was measured (at the start of the study) using a modified piece of gym equipment that measured both speed and power of leg extension, while brain power was measured (at both the start and the end of the study) using computerized tasks that tested memory and mental processing skills. Generally, the twin who had more leg ...