Simultaneous equations are two or more equations with two or more variables. They are simultaneous because they can be solved to give values for the variables that are equal in each equation. This is ...

Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China ...

To participate, submit your response here by July 10 at 9 a.m. Eastern. This week’s winners will be announced by July 22. By The Learning Network Heeva Alavi, an Iranian-American, writes about her ...

Contributed by George M. Church, July 15, 2018 (sent for review September 22, 2017; reviewed by Chase Beisel and John M. Marshall) CRISPR-based gene drive systems—genetic elements which could be ...