Fossil
yes
A fossil is a trace of an organism that lived long ago.
the remains of a living thing that lived a long time ago is called a fossil.
Because there is no evidence to suggest that the loch ness monster exists, it is hard to say how long it has existed.
There in no evidence that any have lived that long.
Three Reasons: 1) The organism lived/lives for a large period of time (species was/is in existence for a long time) 2) The organism lived/lives over a vast geographical range (species lived/lives in more than just a few specific areas) 3) The organism has/had hard parts (ex: bones)
it must have lived through a long span of time
your ancestors?
Iroquois lived in winter and summer houses called "long house"
they give us direct evidence of forms of life that lived long ago
Mostly the evidence is of pottery or artifacts that humans used before they got buried. It may also be skeletons of humans or animals who lived a long time ago!
They are called striations.