Cockroaches are ancient insects that have been around for some 300 million years, and one of the reasons they've been able to stick around that long is that they're able to change with the times. These insects survived the mass extinction that wiped out the dinosaurs, and now they're adapting to resist our efforts to eradicate them.
Although cockroaches are known to eat just about anything, some roaches have adapted to sugar traps used by humans to kill them in our homes. To these roaches, glucose tastes bitter instead of sweet. Researchers from North Carolina State University conducted two experiments, one in which they gave the cockroaches two food options -- jam and peanut butter -- and another in which they directly analyzed the cockroaches' taste receptors.
This adaptation is just one example of this humble creatures ability to do what it takes to survive. In this slideshow, find out why the cockroach is able to endure just about anything.