Ocular, the lens also known as the eyepiece in a refracting telescope and in a microscope.
The female birth control pill has been around for decades, and many men would like to share the contraceptive responsibility. But despite the lingering promise of non-barrier, reversible male birth control options, the FDA has yet to approve any. As we wait for male birth control to become a reality, test your knowledge of its development so far.
Fusion reactors will use abundant sources of fuel, will not leak radiation above normal background levels, and will produce less radioactive waste than current fission reactors. Learn about this promising power source.