[AndrewC]

We know it was seven million years old because it was in a rock that old

Can you say sand?

It was found in the desert in Chad by an international team and is thought to be approximately seven million years old

It seems to not have been dated yet.

[mykej]

From the article in Nature:
"Since 2001, the Mission Paléoanthropologique Franco–Tchadienne (MPFT), a scientific collaboration between Poitiers University, Ndjamena University and Centre National d'Appui à la Recherche (CNAR) (Ndjaména), has recovered hominid specimens, including a nearly complete cranium, from a single locality (TM 266) in the Toros-Menalla fossiliferous area of the Djurab Desert of northern Chad (Table 1). The constitution of the associated fauna suggests that the fossils are older than material dated at 6 Myr from Lukeino, Kenya8, 9. Preliminary comparison with the fauna from the Nawata formation at Lothagam, Kenya12, 13, suggests that the fossils are from the Late Miocene, between 6 and 7 Myr old. All six recovered specimens are assigned to a new taxon that is, at present, the oldest known member of the hominid clade."

[Gumlegs]

It seems to not have been dated yet.

That's only because it hasn't met Bill Clinton.

[RobRoy]

I was joking...

[Dan(9698)]

"It seems to not have been dated yet. "

Much too young --- Maybe co-ed parties with chaperones?