February 1, 2003 |
Mammalian sperm cells use heat to find their way to an egg, much as heat-sensing missiles seek out their targets. Eggs use chemical signals to lure sperm, but this alone cannot account for the speed of fertilization. Now scientists at the Weizmann Institute of Science in Israel report in the journal Nature Medicine that sperm move toward heat.
August 7, 1989 |
An estranged couple's fight over the fate of seven fertilized human eggs goes to court today. Junior Lewis Davis seeks to prevent his wife, Mary Sue Davis, from attempting to become pregnant with any of the eggs now that they are getting divorced. Davis says he no longer wants to have a child with her. The eggs were taken from Mrs. Davis and fertilized with Davis' sperm in an in-vitro fertilization program the couple entered six years ago in hopes of having a so-called "test-tube baby."
June 1, 2004 |
GRAY whales are having a baby boom, with nearly 180 cow-calf pairs migrating from Baja California, according to a recent census taken from Palos Verdes Peninsula. That's twice as many as in the previous season, which was also productive. Federal wildlife officials made similar observations near Monterey. Not all the whales can be seen, but the counts are considered an indicative sample. Scientists say abundant food in the Bering Sea is helping the whales rebound.
January 10, 1995 |
When Michael Schneider became paralyzed after a car accident in 1987, his doctors told him he would never have children. The neurological damage to Schneider, a quadriplegic who uses a wheelchair, left him with poor muscle function, which impairs his ability to ejaculate. He is among the estimated 90% of the 150,000 spinal cord injured Americans incapable of conceiving.
January 3, 1993 |
When they converged in San Francisco about 45 years ago, Wolfgang Paalen, Gordon Onslow Ford and Lee Mullican wanted nothing less than to be image makers of cosmic freedom. The purpose of art, they thought, was self-transcending awareness.
April 24, 2011 |
The San Fernando Valley is 260 square miles of suburbia. Actually, make that suburbia on nutritional supplements. And antidepressants. With perhaps a little cosmetic surgery south of Ventura Boulevard, where the big money is. Or maybe - now that it's grown to more than 1.7 million people in nearly three dozen cities and neighborhoods rich and poor - the Valley isn't even a suburb anymore. It begins just 10 miles northwest of Los Angeles City Hall, sprawling west to the Simi Hills, north to the Santa Susana Mountains, and east to the Verdugo and San Gabriel mountains.