PBT Strategy: Review EPA's multimedia agency-wide strategy for addressing PBT chemicals. PBT Action Plans: Review EPA's national action plans for the priority PBT chemicals. Priority PBT Profiles: Find here the list of priority PBT chemicals for which the Agency is developing national action plans.As chemicals are added to this priority list, they can be found here. Each chemical also has a short chemical profile.lthough this particular investigative initiative involving 12 specific PBT Chemicals is no longer active, EPA is actively addressing PBT chemicals across the Agency through various programs and projects.
More than 100,000 years ago, early humans built a stone calendar that predates all other man-made structures found to date. This discovery is so astounding that it requires a true paradigm shift in our approach to ancient human activity, as it takes us closer to the emergence of the earliest humans on planet Earth.
Forget cryopreservation â hot and dry conditions might be all you need to awake far into the future. A date palm seed some 2000 years old â preserved by nothing more than storage in hot and dry conditions â has germinated, making it the oldest seed in the world to do so. The ancient seed was found along with several others in the 1960s in the Masada fortress on the edge of the Dead Sea in Israel.