Russian opposition leader Alexey Navalny was again absent from two scheduled court hearings conducted via video link on Friday, according to a statement from his team. Navalny’s team say the…

No species lasts forever — extinction is part of the evolution of life. But at least five times, a biological catastrophe has engulfed the planet, killing off the vast majority…

There has been no shortage of bleak climate news this year: unprecedented global heat fueled deadly extreme weather events, scientists issued dire warnings that next year may be worse still,…