The Search for Extra Terrestrial Intelligence, or SETI, has gone on since it was first recognized that the planets and stars are objects like the earth and the Sun. Many techniques from history were rather limited before we had electronics and nuclear technologies. Some of the present techniques will be discussed, and the possibilities of future systems based on what have been planned by various groups and organizations. Technology developed in the last few years have not only identified over 2000 exo planets, but is getting data on their atmospheres. Latest technology to search for intelligent life now includes newer optical technology as well as radio waves .

"The Workshop and the World - what ten thinkers can teach us about Science and authority" is born out the current zeitgeist of frustration with what seems a growing trend of denying Science.  The following is a review of the book: 
An eloquent, timely account of what went right and what wrong in modernity when it comes to the ways in which scientific discoveries and theories were received by contemporaries. In lively recountings of telling episodes, Crease discusses a rich array of figures ranging from Francis Bacon and Galileo to Edmund Husserl and Hannah Arendt. He demonstrates how earlier forms of casting doubt on the authority of scientific findings offer clues to contemporary ways by which this authority is put in question. Speaking forcefully to the present moment, Crease spells out a series of concrete and efficacious steps by which science denial can be addressed and combated in our own time.

At Tyler Arboretum in Delaware County by the picturesque Rocky Run sits a peculiar artifact known, at least since 1907, as Indian Rock. Our guide, Don Nigroni, will relate the theories as to what Indian Rock might really be and we will discuss the local history of the Lenape and a strange document, the Walum Olum, ascribed to them. Robb Kerr will be providing botanical information about this scenic Piedmont site and Kim Sheridan will be photo-documenting the day's activities.
We will meet at the Visitor Center by the parking lot at 10:00 AM, then we will hike from the Visitor Center along the Blue Trail for one mile each way to inspect this mysterious stone. Although we may not figure out what Indian Rock really is, we will learn about the history and natural history of this Piedmont site.
Bring insect repellent, sturdy shoes, water, lunch, and a camera.
For directions to Tyler Arboretum at 515 Painter Road,Media, PA 19063, see
(https://www.tylerarboretum.org/visit/directions-hours-admission/).
Admission fees will be paid by PhACT