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GEOMETRY IN NATURE. “But the formative faculty of the earth does not take to her heart only one shape; she knows and is practiced in the whole of geometry. I have seen… a panel inlaid with silver ore; from it, a dodecahedron, like a small hazelnut in size, projected to half its depth, as if in flower.” (Johannes Kepler, 1610, The Six-Cornered Snowflake) https://lnkd.in/duxTaRF View in LinkedIn

THE START. “The key idea is that we have a good empirical understanding of the overall galaxy number density, stellar ages and metallicities as a function of galaxy mass, and estimates of the initial mass function of stars that formed in these galaxies.” https://lnkd.in/d8Jh7TB View in LinkedIn

STRATEGY. “In this work, we outline a simple way to compute the BBH merger rate for stellar remnant black holes that allows one to assess the uncertainties in the various required ingredients in a transparent manner.” (BBH = binary black hole). https://lnkd.in/d8Jh7TB View in LinkedIn

ORIGINS. “As the field now pivots from gravitational wave discovery to gravitational wave astronomy, there are a number of questions we hope to explore in more detail. One basic question is the origin of these massive black holes. Heavy (≳30  M⊙) black holes are expected to exist as the result of stellar evolution, and have been predicted to dominate the LIGO signal.” (M⊙ = solar mass ~equivalent to mass of the sun; LIGO = The Laser Interferometer Gravitational-Wave Observatory). https://lnkd.in/d8Jh7TB View in LinkedIn

QUANTUM AND BLACK HOLES. “It is not known what the limitations are on using quantum computation to speed up classical computation. An example would be the power to speed up PSPACE-complete computations. It is also not known what the limitations are on the duration of time over which classical general relativity can describe the interior geometry of black holes. What is known is that these two questions are closely connected: the longer GR can describe black holes, the more limited are quantum computers.” (GR = general relativity). https://lnkd.in/dByfCJV View in LinkedIn

ROLE IN EVOLUTION. “Recently through a series of observations it has been shown that supermassive black holes (SMBH) residing at the center of galaxies play a significant role in cosmic evolution of structure in the Universe.” https://lnkd.in/dq-SEai View in LinkedIn

Bougainvillea jumping genes causing electric strawberry on white background in the same plant. View in LinkedIn

“RINGWOODITE is the most common mineral phase in the lower transition zone of the Earth’s mantle, at depths of 525 to 660 km. This ringwoodite crystal contains about 1% water. If the whole ringwoodite of the mantle contains this amount of water, it is estimated that there is almost three times as much water in the mantle as in all the oceans combined.” https://lnkd.in/dNuAzU2 View in LinkedIn

NO HEN’S TOOTH. “Stellar-remnant black holes should be abundant in the local Universe.” https://lnkd.in/d8Jh7TB View in LinkedIn

PREVALENT BLACK HOLES. “Fig. 3 clearly shows that the overall black hole number density in the Universe is fairly high.” https://lnkd.in/d8Jh7TB View in LinkedIn