land ▁" W o ody " ▁H ast ings , ▁( M arch ▁ 2 4 , ▁ 1 9 2 7 ▁– ▁August ▁ 6 , ▁ 2 0 1 4 ) ▁was ▁a ▁leader ▁in ▁the ▁field ▁of ▁phot obi ology , ▁especially ▁bi ol um ines c ence , ▁and ▁was ▁one ▁of ▁the ▁found ers ▁of ▁the ▁field ▁of ▁circ ad ian ▁bi ology ▁( the ▁study ▁of ▁circ ad ian ▁rh yth ms , ▁or ▁the ▁sleep - w ake ▁cycle ). ▁He ▁was ▁the ▁Paul ▁C . ▁Mang els dorf ▁Professor ▁of ▁Natural ▁Sciences ▁and ▁Professor ▁of ▁M ole cular ▁and ▁Cell ular ▁Bi ology ▁at ▁Harvard ▁University . ▁He ▁published ▁over ▁ 4 0 0 ▁papers ▁and ▁co - ed ited ▁three ▁books . ▁ ▁H ast ings ▁research ▁on ▁bi ol um ines c ence ▁princip ally ▁focused ▁on ▁b acter ial ▁lum ines c ence ▁( over ▁ 1 5 0 ▁papers ) ▁and ▁din of lag ell ates ▁( over ▁ 8 0 ▁papers ). ▁In ▁addition ▁to ▁b acter ia ▁and ▁din of lag ell ates , ▁he , ▁with ▁his ▁students ▁and ▁colle agues , ▁also ▁published ▁papers ▁on ▁the ▁bio chem ical ▁and ▁mole cular ▁mechan isms ▁of ▁light ▁production ▁in ▁fung i , ▁c n id ari ans , ▁c ten op hor es , ▁pol ych a etes , ▁insect s ▁( fire f lies ▁and ▁dip ter ans ), ▁ost rac od ▁cr ust ace ans ,