Should it be only people with graduate degree who make extraordinary scientific discoveries? Maybe not. Citizen scientists around the world have contributed to new discoveries in fields such as astronomy, biology, meteorology, geography, public health, and more. It can also address social and environmental inequalities, and allow individuals and communities to address issues that concern them through the application of scientific methods and tools. Efforts to harness the work of many hands or crowdsource important data collection or transcription have gained popularity because of their ability to help scientists in tasks that they wouldn’t be able to accomplish, increase public engagement with science, and potentially raise awareness and understanding of scientific issues. They also open up new lines of data in important areas of research, to the benefits of scientists and society. Citizen science requires the participation of ordinary citizens outside of scientific research in universities, governmental bodies, or other research institutions. Participation in citizen science provides individuals with new skills in technology, science, and community organization, as well as informal education on scientific issues. Crowdsourcing can take place as part of citizen science as it relates to large-scale participation that can include tens of thousands of people joining projects online. May's Geothink&Learn 10 panel brings together experts from Geothink and citizen science to discuss the opportunities, challenges, and implications of these issue areas for scientific research, communication, and education.