Revealing Intrinsic Flat $\Lambda$CDM Biases with Standardizable Candles
  Emerging high redshift cosmological probes, in particular quasars (QSOs),
show a preference for larger matter densities, $\Omega_{m} \approx 1$, within
the flat $\Lambda$CDM framework. Here, using the Risaliti-Lusso relation for
standardizable QSOs, we demonstrate that the QSOs recover the \textit{same}
Planck-$\Lambda$CDM Universe as Type Ia supernovae (SN), $\Omega_m \approx 0.3$
at lower redshifts $ 0 < z \lesssim 0.7$, before transitioning to an
Einstein-de Sitter Universe ($\Omega_m =1$) at higher redshifts $z \gtrsim 1$.
We illustrate the same trend, namely increasing $\Omega_{m}$ and decreasing
$H_0$ with redshift, in SN but poor statistics prevent a definitive statement.
We explain physically why the trend is expected in the flat $\Lambda$CDM
cosmology, illustrate the intrinsic bias and non-Gaussian tails with mock
Pantheon data, and identify a similar trend in BAO below $z=1$. Our results
highlight an intrinsic bias in the flat $\Lambda$CDM Universe, whereby
$\Omega_m$ increases, $H_0$ decreases and $S_8$ increases with effective
redshift, thus providing a new perspective on $\Lambda$CDM tensions; even in a
Planck-$\Lambda$CDM Universe the current tensions might have been expected.
