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  • Maricopa County Parks and Recreation: City Nature Challenge Hike

    Spur Cross Ranch Conservation Area 44000 N. Spur Cross Rd., Cave Creek, AZ, United States

    Join Ranger Kevin to learn about and document biodiversity in the park for the City Nature Challenge global Citizen Science competition that runs April 24-27th.   The City Nature Challenge is a global competition between cities to document biodiversity in regions around the world, taking place April 24-27th. Ranger Kevin will lead a hike with stops...

    Free with Park Fee
  • Greater Phoenix City Nature Challenge 2026: Acts of Science – Connected − Comets, Clues, and Our Cosmic Story

    Online , United States

    Help NASA-supported scientists find active comets to find clues about our early universe. All you need is curiosity. Featured Project: Rubin Comet Catchers During this virtual event, you'll look through real images from the Vera C. Rubin Observatory to find comets and other active objects in our solar system. Each comet you spot offers valuable clues...

    Free
  • Mesa Public Library: Citizen Science – Do NASA Science LIVE

    Mesa Public Library - Red Mountain Branch 635 N. Power Rd., Mesa, AZ, United States

    Do NASA Science LIVE is a fun, hands-on event that invite everyone—students, families, hobbyists, and lifelong learners—to help NASA do real science. This event is a part of "Acts of Science: Connected," which will bring us all together in April to celebrate participation in real research for Citizen Science Month! SciStarter is aiming toward a...

    Free
  • Phoenix Public Library: Comets, Clues, and Our Cosmic Story

    Phoenix Public Library - South Mountain Community Library 7050 S. 24th St., Phoenix, AZ, United States

    The project Rubin Comet Catchers invites participants to help find new comets and explore small, icy objects in our solar system using images from the new Vera C. Rubin Observatory in Chile. By looking at these pictures, volunteers can spot comets that have never been seen before. Every discovery helps scientists learn how comets form,...

    Free
  • Maricopa County Parks and Recreation: Discovery Station – Be a Citizen Scientist!

    Cave Creek Regional Park 37900 E. Cave Creek Pkwy., Cave Creek, AZ, United States

    Stop by an information table where Ranger Kevin will teach you how to use your phone to identify and document your nature findings to help the scientific community.  Let’s get you on your way to becoming a Citizen Scientist using the free iNaturalist app that identifies and documents nature photos that you take with your...

    Free with Park Fee
  • Central Arizona Conservation Alliance: Community Science Monitoring of Urban Saguaro Health: The Saguaro Monitoring Program within the Desert Botanical Garden’s Saguaro Initiatives

    Desert Botanical Garden 1201 N. Galvin Pkwy., Phoenix, AZ, United States

    The Saguaro Census, organized by the Desert Botanical Garden, provides an important snapshot of saguaro distribution across the Phoenix Valley. However, long-term monitoring is essential to strengthen these data and better understand changes in plant health and survival over time. To address this need, the Saguaro Monitoring Program was developed as a student- and volunteer-led...

    Free with Admission