| 2025 | Birds of Prey aviaries demolished to make way for new and improved enclosures! |
| 2025 | Amee Borys named Executive Director of Earthplace. |
| 2024 | New classroom constructed in the area formerly occupied by the old auditorium. |
| 2023 | New Harbor Watch research vessel, the Sarah Nicole, is built. |
| 2020 | COVID-19 regulations reshape how we think about teaching and using outdoor learning spaces. |
| 2017 | Publicly-accessible playscape constructed, inspired by how children play in nature. |
| 2016 | 125-seat, open-air ampitheater constructed with lumber donated by a neighbor. |
| 2013 | Tony McDowell named Executive Director of Earthplace. |
| 2007 | 22-acre Partrick Wetlands open space donated to Earthplace. |
| 2006 | Grand re-opening of Natureplace after renovations to modernize and create interactive and interpretative natural history information. |
| 2003 | Wheels In The Woods IV Trail established. |
| 2002 | Name changed to Earthplace, The Discovery Nature Center. |
| 1993 | Building expanded to 22,000 square feet. |
| 1988 | Protected lands expanded to 62 acres. |
| 1986 | Harbor Watch established as an Earthplace Science Program. |
| 1985 | Dr. John D. Horkel, Ph.D. becomes the new Executive Director. |
| 1974 | Edward T. Peach appointed as Executive Director. |
| 1973 | Name changed to The Nature Center for Environmental Activities. |
| 1970 | John Gardner named Director. |
| 1967 | The preschool was founded under the leadership of Donna Weiss and Carole Rubenstein. |
| 1965 | Sculpture of mother bear and cubs donated by artist, Anna Hyatt Huntington. |
| 1962 | Formation of Women's League. Instructional program agreement with Westport, Norwalk, and Wilton school systems. |
| 1961 | Dedication of building. |
| 1960 | Alan Mahl chosen as the organization's first Director. |
| Programs originate in a barn at the corner of King's Highway and Wilton Road. |
| Junior Staff program formed. |
| 1959 | Groundbreaking ceremony for The Mid-Fairfield County Youth Museum, designed by the firm of Gibbons and Heidtmann. |
| 1958 | The first Board of Trustees is established and led by President Dr. Andreas Lazlo and Chairman John Ripley Forbes. |
| The first 10 acres of land donated to the organization by Mrs. Dudley Wadsworth. |
| The initial 53.75 acres of the sanctuary were either gifted to or purchased by the organization between 1958 and the early 1960s. |
| Founders: John Ripley Forbes, Dr. Andreas Laszlo, Mrs. Dudley Wadsworth, Miss Katherine Ordway, Henry Gund, Bern Dibner, James B. McMahon, Jr., Daniel M. McKeon, Mrs. Edward J. Churchill, Mrs. Barbara Gray Mills, Dr. Guy F. Robbins, Aaron Rabinowitz, Harvey L. Koizim, Mrs. John T. Curtis, Dr. George E. Ingham |
