Apparently, this behaviour has been observed before, but it could be the first time it's been captured on video.
These corpuscles had been observed before, but no one before Osler had studied them so thoroughly.
His brushwork communicates a lyric, sometimes satiric joy and a sunny optimism; as has been observed before, it is more Rococo than Ab Ex.
As has been observed before, New Town Velocity, from The Messenger, is as beautiful and affecting a tune as he's ever written.
"These behaviors have never been observed before," Davis notes.
High gas emissions have been observed before, during, and after rockburst events.
The difference in the dayside latitude has also been observed before, by Christiansen et al.
Coordinated lightning behavior has been observed before, but only over short distances.
As had been observed before, the octopuses created three bends in their arms, which acted as joints.
But such a phenomenon has never been observed before, so the rings will require more detailed study.
Why have they never been observed before?
