July 8, 2009 5:10 pm at 5:10 pm #590009
Locusts are experts at avoiding collisions. They fly in swarms many millions strong without ever bumping into each other!
Locusts possess uniquely identified visual neurons that respond selectively to looming stimuli, giving the animal a warning of impending collision. It has been suggested that one such neuron, the LGMD (lobula giant movement detector), issues this warning by generating a peak in its response that occurs about 25ms after a looming object reaches a subtense of 17degrees of arc on their retina. This peak is proposed to be a trigger for escape behaviour.
cant say i really understand the above. it comes out of a lab that is studying this amazing ability of locusts to swarm in the millions for hundreds of miles without bumping into each other (determined by video analysis). they are trying to develop an air collision avoidance detector based on their findings.
of course this would be only ONE particular marvelous detail of the locust’s abilities to fly efficiently in a swarm.
it doesnt answer how they avoid side to side collisions, up collisions, down collisions, how they as a group modify the swarms speed as a unit based on factors of fatigue, changing wind conditions, nutritional state, etc. whatever peripheral machinery they need and how their behavior patterns are coordinated with the perceptive machinery to adjust speed, direction, and position in relation to all their neighbors, who are also adjusting their patterns at the same time.
no, the complexity of it all staggers the mind, if we could (and we never will, with all the labs in the world studying it)define the entire process it would probably be impossible to mentally assimilate it.
where did this ability, far surpassing the best human pilot and his state of the art computer systems and detectors, come from?
yes that makes perfect sense, doesnt it?July 9, 2009 9:39 am at 9:39 am #649982NobodyMember
Yesterday was Geese and today’s topic of interst is Locusts.
1. You have a secret job at the local zoo
2. Ypu’ve just subscribed to national geographicJuly 9, 2009 2:23 pm at 2:23 pm #649983
Nobody, if you don’t know by now, feivel is a regular contributor in the CR on the wonders of nature. He has his own sub-forum called feivel’s wacky stuff.July 9, 2009 3:04 pm at 3:04 pm #649984
On a side note, does this mean that one can extinguish a locust on Yom Tov?July 9, 2009 3:15 pm at 3:15 pm #649985BemusedParticipant
squeak!!! 🙂July 9, 2009 3:53 pm at 3:53 pm #649986oomisParticipant
On a side note, does this mean that one can extinguish a locust on Yom Tov?
No, but if they are of the kosher specie, you may EAT them on Yom Tov! YUM,something new to add to the cholent.July 9, 2009 4:12 pm at 4:12 pm #649987
that was the name of this section before the moderators kindly changed it. i didnt think a section devoted to the awesome work of The Creator should be called “wacky”.
but i guess they didnt or couldnt change the urlJuly 9, 2009 4:43 pm at 4:43 pm #649988
I know that they changed it, but the new name is no better IMHO.
It is Hashem’s Wonders of Creation, not feivels.
Until it is re-renamed, the former is the better title.July 9, 2009 5:14 pm at 5:14 pm #649989NobodyMember
Squeak does this mean we can put in a request for Feivels Wonders of the day bulletin or rather Hashem’s Wonders as reported by FeivelJuly 9, 2009 11:06 pm at 11:06 pm #649990
i asked that my name not be used but was refused, im humble.
you are right that is the best name.
however the title as is really implies: the wonders of creation, (brought to you by feivel). i dont think anyone is fooled by the title into thinking i created these things
- You must be logged in to reply to this topic.