
The SciencesFebruary 1, 1962
Amoeboid Movement
In a new theory to explain the mechanism of motility in amoebae and similar cells,the author proposes that streaming cytoplasm contracts at the front of the cell and literally pulls it along

Amoeboid Movement
In a new theory to explain the mechanism of motility in amoebae and similar cells,the author proposes that streaming cytoplasm contracts at the front of the cell and literally pulls it along

The Moment of Fertilization
When a sperm attaches itself to the surface of an egg, the egg is almost immediately impervious to other sperm. What happens in the egg during this critical biological event?