ScienceDaily: Strange Science News |
- How fast is the universe expanding? Galaxies provide one answer
- Lights on for silicon photonics
- Cheap, nontoxic carbon nanodots poised to be quantum dots of the future
- Rise of marine predators reshaped ocean life as dramatically as sudden mass extinctions
- Squids' remarkable ability to tune both the color and brightness of their iridescence comes down to a subtle but powerful mechanism
- A giant, sizzling planet may be orbiting the star Vega
- Establishing the origin of solar-mass black holes and the connection to dark matter
- These sea slugs sever their own heads and regenerate brand-new bodies
- Research shows we're surprisingly similar to Earth's first animals
- Most distant quasar with powerful radio jets discovered
- Study reveals how egg cells get so big
| How fast is the universe expanding? Galaxies provide one answer Posted: 08 Mar 2021 01:52 PM PST Among the methods astronomers have found to measure the expansion rate of the local universe, the Hubble constant, surface brightness fluctuations is potentially one of the most precise. Scientists have now published the first good SBF estimate of the Hubble constant, pegging it at 73.3 km/s/Mpc: in the ballpark of other measurements of the local expansion, including the gold standard using Type Ia supernovae. The new estimate highlights the mismatch with estimates from the early universe. |
| Lights on for silicon photonics Posted: 08 Mar 2021 12:25 PM PST The demonstration of electroluminescence at terahertz frequencies from a silicon-germanium device marks a key step towards the long-sought goal of a silicon-based laser. |
| Cheap, nontoxic carbon nanodots poised to be quantum dots of the future Posted: 08 Mar 2021 12:24 PM PST Tiny fluorescent semiconductor dots, called quantum dots, are useful in a variety of health and electronic technologies but are made of toxic, expensive metals. Nontoxic and economic carbon-based dots are easy to produce, but they emit less light. A new study that uses ultrafast nanometric imaging found good and bad emitters among populations of carbon dots. This observation suggests that by selecting only super-emitters, carbon nanodots can be purified to replace toxic metal quantum dots in many applications, the researchers said. |
| Rise of marine predators reshaped ocean life as dramatically as sudden mass extinctions Posted: 08 Mar 2021 11:07 AM PST Evolutionary arms races between marine animals overhauled ocean ecosystems on scales similar to the mass extinctions triggered by global disasters, a new study shows. |
| Posted: 08 Mar 2021 10:17 AM PST Squids' remarkable ability to tune both the color and the brightness of their iridescence comes down to a subtle but powerful mechanism. |
| A giant, sizzling planet may be orbiting the star Vega Posted: 08 Mar 2021 08:20 AM PST Vega, one of the brightest stars in the night sky, may play host to a giant planet with average surface temperatures of 5,390 degrees Fahrenheit. |
| Establishing the origin of solar-mass black holes and the connection to dark matter Posted: 08 Mar 2021 08:19 AM PST What is the origin of black holes and how is that question connected with another mystery, the nature of dark matter? Dark matter comprises the majority of matter in the Universe, but its nature remains unknown. |
| These sea slugs sever their own heads and regenerate brand-new bodies Posted: 08 Mar 2021 08:19 AM PST You've heard of animals that can lose and then regenerate a tail or limb. Scientists have discovered two species of sacoglossan sea slug that can do even better, shedding and then regenerating a whole new body complete with the heart and other internal organs. The researchers also suggest that the slugs may use the photosynthetic ability of chloroplasts they incorporate from the algae in their diet to survive long enough for regeneration. |
| Research shows we're surprisingly similar to Earth's first animals Posted: 08 Mar 2021 08:18 AM PST The earliest multicellular organisms may have lacked heads, legs, or arms, but pieces of them remain inside of us today, new research shows. According to a new study, 555-million-year-old oceanic creatures from the Ediacaran period share genes with today's animals, including humans. |
| Most distant quasar with powerful radio jets discovered Posted: 08 Mar 2021 05:42 AM PST Astronomers have discovered and studied in detail the most distant source of radio emission known to date. The source is a 'radio-loud' quasar -- a bright object with powerful jets emitting at radio wavelengths -- that is so far away its light has taken 13 billion years to reach us. The discovery could provide important clues to help astronomers understand the early Universe. |
| Study reveals how egg cells get so big Posted: 06 Mar 2021 08:31 AM PST The process of egg formation in fruit flies relies on physical phenomena analogous to the exchange of gases between balloons of different sizes, according to a new study by biologists and mathematicians. |
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