Yes, and annoyingly it only goes back 20,000 years. Going back 400,000 years would tell a much more interesting story.
x = 1e20 + 1 - 1e20
y = 1e20 - 1e20 + 1
assert x == y
document.writeln(1.0 % 0.2);
x = 1e-20 + 1e20 - 1e20
y = 1e20 - 1e20 + 1e-20
assert x == y