'A unit of work or energy sometimes said to be equivalent to the energy of a mosquito taking off'
an erg
SCIENCE  & NATURE: A unit of work or energy sometimes said to be equivalent to the energy of a mosquito taking off
A unit of work or energy sometimes said to be equivalent to the energy of a mosquito taking off
A unit of work or energy sometimes said to be equivalent to the energy of a mosquito taking off
SCIENC"E"  & NATUR"E"
an erg
SCIENC"E"  & NATUR"E"