太空种子早在１９７５年，美国［阿波罗］宇宙飞船和前苏联［联盟］号宇宙飞船合作飞行时，曾携带了一批枞树种。这种经过宇宙射线、温差变化和失重考验的枞树种，回到地面后，在莫斯科植物园种植。６年以后，这些［太空树种］的枞树种比普通树种的树平均高出３０厘米。１... Space Seeds As early as 1975, a number of fir trees were carried along the cooperative flight of the U.S. Apollo spacecraft and former Soviet Union [Soyuz] spacecraft. This species of fir, which has been tested for cosmic rays, temperature changes and weightlessness, returns to the ground and is planted in the Moscow Botanical Garden. Six years later, these [space species] fir trees average 30 centimeters more than the average tree species. 1 ...