Its height has not been reliably determined, but is believed to be between about 500 and 700 feet.

It was not possible, though, to reliably determine the Hoatzin's closest living relatives.

It is, unfortunately, difficult to determine reliably if the labor that went into a particular item was handled humanely.

Even better would be a sonographer who could reliably determine the presence of a nasal bone in the fetus.

It helps the driver to reliably determine the aspect of the next signal even in poor visibility and at high velocities.

The efficiency of each step is about 98%, which allows about 50 amino acids to be reliably determined.

With the remains at hand, however, it cannot even be reliably determined whether Gallornis was a paleognath or a neognath.

Geomagnetic poles cannot be reliably determined for Devonian or older rocks thanks to the folding.

The exact wavelength used is not known, but it is fairly reliably determined to have been in the neighborhood of 350 meters.

Ping packets could reliably determine whether a computer was on line at a specified IP address.