To the Editor: The renowned American scientist, Ray Kurzweil, claims human beings could become immortal as early as the year 2029! He says advancements in nanotechnology and a detailed and increased understanding of the working of a human body could enable human beings to become immortal. He says humans could be replacing their vital organs […]
Stem cells hit the limelight in November 1998, when researchers first reported that they had isolated human embryonic stem cells. These cells, isolated from embryos that were several days old, can theoretically be differentiated into any kind of cell in the human body, from blood cells to brain cells to muscle cells.