Ask An Expert: What should I bring on my first hike?

County of San Diego Parks and Recreation

Park Ranger Alex shares some recommendations on what you should bring on your first hike.

Ask An Expert: What should I do if I encounter a swarm of bees?

County of San Diego Parks and Recreation

Supervising Park Ranger Josh shares some tips if you ever encounter a swarm of bees.

Ask An Expert: What's causing some oak trees to die?

County of San Diego Parks and Recreation

Park Ranger Alex explains how the gold spotted oak borer caused some oak trees to die in our County parks.

Beads Simulation of DNA Mutation

San Diego Mesa College STEM Conexiones

This experiment is presented by Courtney Russell, a second year student at San Diego Mesa College studying Mechanical Engineering. To understand how mutations are caused and how they are related to evolution. Since we only had ten seconds we expected to make some mistakes. DNA has to make duplicates and copies of a lot of information in very short periods of time so perfection is not expected of them either. These imperfections or mutations are a part of evolution, without mutations our bodies would not have learned how to adapt to the environment.

Bubble Experiment

DRS DAYLIGHT SOLUTIONS

Demonstration of the principal of refraction using bubbles.