In scientific usage, a phenomenon is any event that is observable, however common it might be, even if it requires the use of instrumentation to observe, record, or compile data concerning it. In natural sciences, a phenomenon is an observable happening or event.

Phenomena

Fenómenos naturales

Development

Desarrollo 

Biological Development

Leadership Development

Community Development

Desarrollo de Comunidades

Professional Development

Physiological, psychological, and sociological growth or maturation occurring throughout an individual's lifetime.

Human Development