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
    Re: Dung beetles navigate by stars
    From: Ed Popko
    Date: 2015 Aug 29, 13:28 -0700

    Bruce,

    I see navigation techniques and relationships in many places. We don’t have a monopoly!

    For instance, there is strong evidence that the Vikings navigated on cloudy days by using sunstone, also called Iceland Spar. It’s a type of transparent calcite, that exhibits light-polarizing properties that can tell the direction of the sun within a few degrees in both cloudy and twilight conditions.

    The Academy of Science paper in the reference given suggests the Dung Beetles are doing the same thing with light polarization.

    The 1992 recovery of an Iceland Spar sunstone from the Elizabethan ship Alderney (1592) suggests that Iceland Spar and light polarization were regular navigation practice among the Vikings.

       
    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