41. For Martian atmospheric entry after long exposure to zero gravity , the upper limit is 4 Gs. 42. The first was an experiment testing the synergistic effect of zero gravity on sea urchin eggs. 43. The skeletons within living cells may not form properly in zero gravity , say researchers in France. 44. "We want to see how an older person would adapt to zero gravity , " said Sprott. 45. Virtually weightless in zero gravity , the spacesuits, with backpacks, weigh close to 300 pounds on Earth. 46. The central column section would be zero gravity . 47. Foale is conducting a greenhouse experiment to learn more about how plants grow in zero gravity . 48. Big globs of water, shimmering in zero gravity , clung to every bend in the exposed plumbing. 49. Air time is when there is zero gravity , and the rider actually lifts momentarily from the seat. 50. Science can test the effects of aging on the ability to withstand the rigors of zero gravity .
