Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Monarch Butterfly Navigation
    From: Bob Goethe
    Date: 2016 Apr 19, 10:29 -0700

    Turns out that being able to measure time accurately is important not just in human-navigation.

    http://www.bbc.com/news/science-environment-36046746

    Scientists have ...solve(d) the mystery of one of nature's most famous journeys - the great migration of monarch butterflies from Canada to Mexico.

    ...two control mechanisms - one based on the timekeeping "clock" neurons in the butterflies' antennae and the other from what are called azimuth neurons in their eyes. These monitor the position of the Sun.

    "The circuit gets those two signals then matches them, according to how it's wired, to control signals that tell the system if a correction is needed to stay on the correct course," explained Prof Shlizerman.

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site