This harrowing tale of supernatural suspense kicks off a new series from the visionary mind of #1 New York Times bestselling author Scott Westerfeld. When a plane crash-lands in the arctic, eight young survivors step from the wreckage expecting to see nothing but ice and snow. Instead they find themselves lost in a strange jungle with no way to get home and little hope of rescue. Food is running out. Water is scarce. And the jungle is full of threats unlike anything the survivors have ever seen before--from razor-beaked shredder birds to carnivorous vines and much, much worse. With danger at every turn, these eight kids must learn to work together to survive. But cliques and rivalries threaten to tear them apart. And not everyone will make it out of the jungle alive.

A century ago, life expectancy was roughly 40 years, hence all income could be consumed, as for most people, there was no need to save for retirement. Today, things have drastically changed: Life expectancy exceeds 80 years in many countries, and one should expect to live and consume many years after retirement. Thus, we have many investors with various investment horizons, where the length of the investment horizon becomes a crucial factor in determining the best investment diversification.This book analyzes the effect of the investment horizon on the optimal diversification, specifically between stocks and bonds: Should a young investor and an older investor have the same portfolio? Is it recommended to savers for retirement to change the asset allocation between stocks and bonds as they grow older, as life cycle mutual funds do in practice? Is the idiom 'stocks for the long run' backed by scientific evidence? We analyze for which horizons it is recommended to employ the popular Mean-Variance rule and for which horizons employing this rule induces an economic distortion, hence a loss to the investors. It is shown that all relevant parameters for investment choice (means, variances, and correlations) change in a non-linear way with the horizon, a fact that makes the investment horizon crucial for investment choices. Similarly, the popular Sharpe, Treynor, and Jensen performance indices vary with the assumed horizon even in the case of independence over time. To analyze all the above issues, we employ the Mean-Variance rule and Stochastic Dominance rules, as well as direct expected utility calculations.

Spacetime physics -- Physics in flat spacetime -- The mathematics of curved spacetime -- Einstein's geometric theory of gravity -- Relativistic stars -- The universe -- Gravitational collapse and black holes -- Gravitational waves -- Experimental tests of general relativity -- Frontiers