Try some other small objects to find out about their densities. The oil is the least dense liquid, so it floats on the other liquids. Honey (or corn syrup) is the most dense of the three liquids, so ...

Some objects float in water and other sink. But did you know that you can change whether something floats or sinks by adding a substance to the water? Let's try it and see! Pour water into a cup until ...

As sea levels rise, things are getting more and more complicated ... "We think that sustainability on the water can work even better than sustainability on land,” Koen Olthuis, an architect ...