03:27
Biological Treatment Technologies: Phytoremediation
Traditional bioremediation uses microbes to degrade organic substances. However, toxic metals are already in an elemental form, and cannot be degraded further. Phytoremediation, a fascinating extension of bioremediation, uses certain green plants ...
04:06
The Past, The Future, and the Human Mind
Philosopher Daniel Dennett credits the development of distal perception capacity with the human ability to understand the world--including those things that are beneficial and those that are not--and make plans accordingly. Professor Dennett states ...