Word: cyclicals
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Whether these catastrophic impacts are random or cyclic remains to be seen. But if they occur at all, they could shake the foundations of evolutionary biology and call into question the current concept of natural selection. Should the Alvarez theory be correct, says Harvard Paleontologist Stephen Jay Gould, the importance of competition between species diminishes. If every so often a megablast opens up a broad array of ecological niches, then new creatures can flourish without having to crowd out the old. "If you ask the question, 'Why are we here?' " says Gould, "the answer is, 'Because the dinosaurs disappeared...
Postel said that the current outbreak occured primarily among young people might be attributed to the virus's cyclic pattern and that possibly the present generation of college age students grew up without immunity...
Tremblay unfolds the plot through gradual, cyclic self-revelation. On returning from a three month vacation in Europe to escape his family's problems. Serge has talks with his father and two aunts, his three elder sisters, and his lover, Nicole--and has talks, and has talks, and has talks. Wingrove's blocking is deft: Serge travels an a small circle around his bed, center stage, and is able to enter the houses and lives of each of his relatives with one single step towards their particular corner of the stage. His jerky, frantic movements contrast markedly with the immobility...
...tail under the other's body, strokes the partner's back and neck, joins genital regions, and rides on top for one to five minutes. The active female lizard always has small undeveloped eggs, while the passive female has large pre-ovulatory eggs. But there are cyclic variations in behavior and egg size in these reptiles, and roles reverse; the passive female of one encounter can be the active partner of the next. Says Crews: "We are now trying to determine whether this malelike behavior facilitates reproductive function." Translation: the psychobiologist does not yet know why the females...
...menstrual cycle, heterosexual men almost always touched the breasts in the same way. Even when breast play caused pain, the wives reported the fact to the researchers, but not to their husbands. Say Masters and Johnson: "When the husbands were queried separately, they expressed surprise at their wives' cyclic distress, and the unanimous reaction was 'Why didn't she tell...