The synthetic chemicals — called PFAS — never break down naturally.
- The results don't suggest that eating from any of these restaurants poses a serious health risk.
- The Food and Drug Administration allows a certain amount of PFAS to exist in food containers.
- Still, the science behind the health and environmental effects of PFAS remains largely unclear.
New research reveals a major shift in what pressures life used to face.
- For the vast majority of the evolutionary history of ocean life, sudden changes in climate and oceanic chemistry had a huge impact on what life could flourish and what life could not.
- But about 170 million years ago, this changed. The ocean became more stable, and things like predator-prey relationships started to dominate how life evolved.
- The reason for this sudden change? Calcifying plankton came to dominate the oceans.
Harvard engineers make a breakthrough polarization camera.
- Harvard researchers create a tiny camera that can see polarization.
- Seeing the invisible light can help in numerous applications, from self-driving cars to satellites.
- The scientists used nanotechnology to achieve this feat.
Its scarcity could impact scientific research as well as the high-tech industry.
- Although it's commonly used to make balloons float, helium is actually a precious, non-renewable resource.
- Without helium, a great deal of scientific research can not be conducted, and technology like MRI machines won't work.
- The demand for helium is enormous and growing; there is no way to create artificial helium economically and no way for the Earth's helium stores to sustain the demand.
The periodic table was a lot simpler at the beginning of the universe.
- Michelle Thaller's "absolute favorite fact in the universe" is that we are made of dead stars.
- The Big Bang, when it went off, produced basically three elements: hydrogen, helium, and lithium. Every atom more complex had to be formed inside a star. Over time, stars such as the sun produce things like carbon and oxygen.
- They don't really get much more far off the periodic table than that. If you want to go any farther than the element iron, then you actually need a very violent explosion, a supernova explosion.