Testing a new spacecraft that cleans up space debris using nets and harpoons. By Jeremy Hsu.

Is Deep-Sea Mining Worth It? The race is on to exploit - and protect - the ocean floor. By Thomas Peacock & Matthew H. Alford.

Meet the ocean creatures that use a mesh of mucus to catch their food, written by Kelley Sutherland.

Low emotional security can intensify our relationships to our belongings. By Francine Russo.

The Security Risks of Logging in With Facebook. By Louise Matsakis.

Studies indicate genetic changes early in a primary tumor, point to a promising new approach to therapy. By Jeffrey P. Townsend.

The rise of the atheists. A credible indirect estimate says 26 percent of Americans are atheists. By Michael Shermer.

The arctic climate is shattering record after record, altering weather worldwide. By Jennifer A. Francis.

Social scientists have begun to close in on new ways to stop people from taking their own lives. By Lydia Densworth.

Studies of the bite forces of crocodiles and their relatives reveal secrets of their evolutionary success. By Gregory M. Erickson.