Scientists believe that baryonic dark matter makes up a significant portion of the universe.

I decided to take a shot in the dark and apply for the job even though I didn't meet all the qualifications.

I woke up at oh dark hundred to catch the early morning flight.

I woke up at oh-dark-thirty to catch my early morning flight.

Scientists believe that warm dark matter consists of particles that travel at relativistic speeds.

Scientists believe that hot dark matter plays a crucial role in the formation of galaxies.

Scientists believe that cold dark matter makes up a significant portion of the universe.

The dark green fritillary is a big butterfly found in Europe.

The dark green fritillaries fluttered gracefully in the meadow.

I woke up at o-dark-thirty to catch my early morning flight.