World Athletics to require gender testing for female track and field athletes under new policy
World Athletics has announced that it will begin genetic testing for all female track and field athletes in the future, ...
C&EN4mon
Colors on the Mooooove
1. Carefully pour some milk in a dish so it just covers the bottom. 2. Gently add one or two drops of red, blue, and yellow food coloring to the same spot in the center of the milk. 3. Dip a cotton ...