Judges Chris Ready and Louisa Van Baalen speak with senior Emma Rothkopf about her project on diseases of the trees of Harvard.

Juniors Rachel Strathdee and Adeline Gall demonstrate equipment they built to experimentally prove the cyclotron equation.

Daniel Shrives holds up a container of compost being devoured by red worms.

Carina Mangiacotti displays her model of DNA.

A replica of a coral reef by sophmore Nicole Lynch.

Wendy Sisson of the Harvard Conservation Commission asks Teague Neschke about his experiment on food preferences of grey squirrels.

Nick Wyman looks over the shoulder of Matty Banker who’s thumbs up on his project on dusting for finger prints.

Cameron Hamilton (left) and Annie Cooper with "Darwin" at a project that measures the effects on dogs and stuffed animals on blood pressure.

Matt Chambers (left) and Declan Dean explain their experiment on magnetic plants to Virginia Justicz.

Brett Keating and Emma Noyes ponder the effects of double-dipping.