A
fossil might be the mineralized bone of a dinosaur.
Or
the tooth of a saber-tooth tiger.
It
might be the hard shell of a clam, or it might be (if you're really,
really lucky) the impression of a soft organism such as a jellyfish.
Any
trace of ancient organisms is considered a fossil, and people have
found billions and billions of them, representing hundreds of
thousands of different species. All these fossils, together, make a
kind of textbook showing the way in which many different creatures
have changed over the millennia. This change over time is what we
call evolution.
Check
out some fossils today. You can enjoy looking at the real deal at
most natural history museums, most rock shops and some jewelry
stores, and even some parks and recreation areas such as Dinosaur
National Monument or Fossil Butte National Monument. Check out your
local treasures (I know we Southern Californians have a fossil dig
for kids at Jurupa Mountains Discovery Center, in Riverside, and also
at Ralph B. Clark Regional Park, in Buena Park!).
Or
you can do your fossil-finding with your mouse:- the official National Fossil Day website, and
Also
on this date:
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