Figure 1. Experimental set-up.
Container with bread crusts in the foreground and one of the sticks inside the enclosure (photograph by EB).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.