At this year’s Think Big STEM networking/inspiration event yesterday at the Newton Free Library, 80 middle- and high-school students heard practical, inspirational talks by Dr. Oneeka Williams and Angela Pitter, then met in small groups with 15 adult mentors in a wide range of STEM careers. Many thanks to mentors for their care and advice, to the LigerBots for all kinds of assistance, to Cabot’s Ice Cream for refreshments, and to Angela Pitter of Livewire Collaborative for broadcasting the event via Facebook Live on the Library’s Teens page.