This generation is very special. In just one generation they can fly to Mexico. [FOREIGN] sensory information including the light [FOREIGN], OK? [FOREIGN] Okay? [FOREIGN] It's really special, so they take a flight, like a cycle. [FOREIGN] Right, so [INAUDIBLE] it's important for everything, right? And also of course, this one, this special [INAUDIBLE] for this. Just take a look. This is a moth, this is a female. [FOREIGN] When you turn on the fan [FOREIGN]. You can see, actually, this male actually smells something there, right? And then this guy came, approached the female, okay? So it's definitely based on the sensory information. Okay, so if you can find this guy. What kind of information does the male base on to find the female? What's the information? What kind of cue? >> Chemical. >> What? >> Chemical. >> Chemical. Okay, yeah that's possible right. Maybe the thing you turn on, like a funnel. [FOREIGN] A female, is she a chemical? [FOREIGN] Concentration? Okay. Right. [FOREIGN] The chemical, the [FOREIGN] you got, grade in and concentration and grade in. [FOREIGN] Based on ingredient. [FOREIGN] Wow, yeah, this male can seed a female [FOREIGN] To demo is really a chemical detection. [FOREIGN] Okay. [FOREIGN] It's clear, describe base on their chemo reception to detect the The Now there are many sensory modalities actually in different animals. Actually they're quite different. For example, this infrared detection [FOREIGN], okay. In human we don't have. But actually for this guy, for the snake, they can detect the infrared light. [FOREIGN] infrared detection. [FOREIGN] [FOREIGN] Of course. Based on this information, you already know. The spatial information actually, since spatial resolution is not high [FOREIGN] All right, so here is just some demonstration of the sensory system. They're really important for the animals' survival and also for the reproduction. For animal species, of course. Most important thing, actually, you need survival. [FOREIGN] The second one is reproduction. [FOREIGN] Right? [FOREIGN] Right?