With three weeks of data, can you tell which Mystery Class sites are north and south of your hometown?

Ryan Kingsbery, USGS

I am a Pinniped, but some call me a "tooth-walking seahorse" because I use my canines to help pull myself out of water. And my highly sensitive vibrissae help me find food. I live in a place where winter is ending and days are getting longer.

Looking for a Clue?
Half of the Mystery Classes are located in my hemisphere.

Photoperiod Clues from the Mystery Sites

• Clues for Friday, February 9
• Record and Graph

Compare Your Photoperiod

• Look up your data for February 9
• Record and Graph
• Report to map, select Daylight
• Explore the Map
• Guiding Questions

Journal: Latitude and Location

How do the data and graph lines show you which Mystery Class sites are north and south of your latitude?

• Week #3