71.   Those new cell sites are badly needed.

72.   Tissue from pig intestines is used to replace knee ligaments, and then stimulates new human cell growth so that pig gut turns into human ligament.

73.   Thus brains develop by pruning and sculpturing, not by building networks with billions of new cells, Rakic and others theorized.

74.   To reach those speeds, carriers are undertaking massive upgrades to their networks, including new cell towers and switching equipment.

75.   To supporters, the company is an innovator that developed a new human cell technology, leading to more competition and lower cost therapeutics.

76.   Unlike most other kinds of cells, which live only for a few days or weeks, stem cells continue to produce new cells over a lifetime.

77.   Until recently it had been thought that the brain never renewed itself or added new cells after gaining its mature form.

78.   Until recently, medical dogma also held that the brain could not grow new cells.

79.   Whatever the new cells are doing in the cortex, they affect regions of the brain that are central to human thought and identity.

80.   While antibiotics kill bacteria, Relenza and Tamiflu merely disable the enzyme that enables the influenza A and B viruses to spread to new cells.