needs to expand that effort to include "continuing education"—which 
can be achieved only through professional contacts and communication. 
Meetings and symposia such as this one are important/ but they cannot 
possibly reach the thousands of researchers who cannot obtain the 
funds to attend them/ nor can they bridge the ever-growing gap between 
northern and southern science. One solid/ substantial contribution in 
which we can all participate/ however/ is the recycling of profession 
al literature—a bit of aluvium (as it were) to help fill that gap.