5 Things You Need to Know Today, 4/18

1) Today will be mostly sunny and much cooler, with a high near 53. Tonight will be partly cloudy, with a low around 42. 

2) Today from 9am-12:30pm, the will host a free workshop on "Cleaning Up Our Coastal Waters." What is a TMDL? Do you understand why the state of Massachusetts is investing tremendous resources into developing and implementing these regulatory standards? Do the terms nitrate, nitrification and denitrification cause you to raise your eyebrows? Are you comfortable explaining these concepts to others? Be honest! If you would like to enhance your understanding of these coastal issues and improve your ability to communicate about them, this workshop is for you.

3) Trivia Buff is a team-oriented trivia game that takes place every Wednesday at 8pm at . Bring some friends and win prizes by coming out on top!

4) Attention local musicians—have you heard about ? The grand prize winner will get to headline a gig at The Harp in Boston in June! Hurry, submissions are due by noon Friday, April 20.

5) Fun fact of the day: A hummingbird weighs less than a penny!