Plural of Antenna

I have always thought the plural of Antenna is Antennae. Somehow, I remember this for a long time.

When other people use Antennas, I always thought it was wrong.

Only until recently, I found both are actually correct.
Antennas is used when describing equipment, and antennae is used when describing living things.

From http://dictionary.reference.com/browse/antenna

an·ten·na (ān-těn'ə) Pronunciation Key
n. pl. an·ten·nae (-těn'ē)

1. 1. Zoology One of the paired, flexible, segmented sensory appendages on the head of an insect, myriapod, or crustacean functioning primarily as an organ of touch.
   2. Something likened to this sensory appendage, as in function or form: sensitive public relations antennae.
2. pl. an·ten·nas A metallic apparatus for sending or receiving electromagnetic waves.