Cosmological Issues in $F(T)$ Gravity Theory
  We review recent developments on cosmology in extended teleparallel gravity,
called "$F(T)$ gravity" with $T$ the torsion scalar in teleparallelism. We
explore various cosmological aspects of $F(T)$ gravity including the evolution
of the equation of state for the universe, finite-time future singularities,
thermodynamics, and four-dimensional effective $F(T)$ gravity theories coming
from the higher-dimensional Kaluza-Klein (KK) and Randall-Sundrum (RS)
theories.
