Pure water has both a freezing point and melting point of 0˚C; however water also has colligative properties meaning that the freezing point can vary depending on the
Diving to depth is a typical behaviour observed in many aquatic mammals such as; whales, otters, seals, walrus and many others. Such mammals are well adapted at diving.
Oxygen comprises a large proportion of our atmosphere (21%) and has become a vital gas for many organisms on Earth. Without it our ability to produce energy (as
