If you don’t have cues for sleep time, your sleep cycle becomes 25 hours long.

We’ve all wished there were more hours in the day before. We just have too much to do and 24 hours isn't long enough. Well there may be a scientific reason that we feel this way.
Humans may be programmed for a sleep-wake cycle that is out of sync with the world's 24 hour day-night cycle. In 1938, two men, Nathaniel Kleitman and Bruce Richardson, decided they wanted to know how cave men slept.
In other words, how long would humans sleep and then stay awake if there were no external cues to tell them when to go to bed and when to wake up.
After searching for the perfect location that would completely isolate them from the outside world, they settled on a cave. Just like the cave men of prehistoric times. For 33 days, they stayed in the cave and let their bodies tell them how long to sleep.
What they found and what subsequent experiments have found is rather odd. They discovered that, when left to its own devices, the human body actually follows a 25 hour sleep-wake cycle rather than the 24 hour one that the world's turning dictates.

Scientists created a robotic cockroach that can make real cockroaches follow it!

European scientists developed Insbot, an electronic cockroach that can trick real cockroaches into following it. The Insbot was developed under the European project LEURRE. The project aimed to study, model, and control mixed societies of animals and robots. The Insbot is very small, measuring at 19 by 30 by 41 millimeters cubed. It doesn’t even look much like a cockroach… it’s just a box.
The way it fools cockroaches is by sending out signals with its sensors. It can communicate with other cockroaches and get them to follow its lead.
The scientists chose an American cockroach, because it is so small. They studied the processes and means of communication between cockroaches and worked from there. The result was pretty amazing, don’t you think?