The ultimate aim of all science to penetrate the unknown and do you realize we know less about the earth we live on than about the stars and the galaxies of outer space.
dissenting
dissertation
disrespect
disqualification
disregard
disreputable
district
disrespectful
disrepute
ditch
dumb
duly
dorsal
dossier
dose
dormitory
dopey
dorky
doting
doorknob
dolphin
dogged
disown
disorient
disorientation
disorganized
disillusion
dispenser
disillusionment
disinterested
dishonorably
disheveled
disgrace
disgusting
disgust
dishearten
disheartening
disgusted
disgraceful
disfigurement
discrimination
discretion
discriminate
discrepancy
discretionary
diseased
disembarkation
diabetic
diabolical
diagnose
devote
detour