Existing physical theories do not predict every feature of our experience but only certain regularities of that experience. That difference between what could be observed and what can be predicted is one kind of limit on scientific knowledge. Such limits are inevitable if the world is complex and the laws governing the regularities of that world are simple. Another kind of limit on scientific k...

We present a new solution in the heterotic M–theory in which the metric depends on (cosmic) time. The solution preserves N = 1 supersymmetry in 4 dimensions in the leading order of the κ2/3 expansion. It is the first example of the time–dependent supersymmetric solution in M–theory on S/ZZ2. It describes expanding 4–dimensional space–time with shrinking orientifold interval and static Calabi–Ya...

Neutrinos are the among the most abundant particles in the universe. This means that they have a profound impact on many different aspects of cosmology, from the question of leptogenesis in the very early universe, over big bang nucleosynthesis, to late time structure formation. At late times (T ∼<TEW) neutrinos mainly influence cosmology because of their energy density and, even later, their m...

This article clarifies the often overlooked facts attributed to European missionaries in Asia, especially Jesuits, who acted as catalysts of a kind nuanced acculturation named Accommodatio (adaptation). To great extent, they became harbingers culture and science more than faith itself dismay many, including Roman Church. Such cultural scientific transference was actually two-pronged, for simult...

Brane-world models, where observers are restricted to a brane in a higher dimensional spacetime, offer a novel perspective on cosmology. I discuss some approaches to cosmology in extra dimensions and some interesting aspects of gravity and cosmology in brane-world models. COSMOLOGY AFTER EINSTEIN A century after Einstein first proposed his theory of relativity, it has become a cornerstone of th...