Oxygen in the form of the oxygen molecule (O2), produced by plants and vital for animals, is thankfully abundant in Earth’s atmosphere and oceans. Researchers studying the history of O2 on Earth, however, know that it was relatively scarce for much of our planet’s 4.6 billion-year existence.
A new study by an international collaboration involving Earth and Environmental Sciences Professor Brian Kendall suggests the world’s first mass extinction event 540 million years ago was caused by a widespread loss of dissolved oxygen in the Earth’s oceans.
The Faculty of Science held its 116th Convocation ceremonies today to celebrate the achievements of two honorary degree recipients, two highly distinguished honorees and 1007 graduating students. Among them, 786 Bachelor degrees, 66 Master degrees and 40 Doctoral degrees, 87 Doctor of Optometry and 28 Doctor of Pharmacy degrees were conferred.