|
|
|
Some male birds and mammals congregate in communal courting grounds called leks.
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...
3-month-old baby in one of Rovee-Collier's memory experiments