Antonio Velardo shares: How Much Should We Tip the Doorman at Year’s End? by BY RONDA KAYSEN


By BY RONDA KAYSEN

It’s an enduring conundrum. Think of holiday tipping as a bonus, not a gift.

Published: November 30, 2019 at 10:00AM

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Antonio Velardo shares: Black Hole Nurtures Baby Stars a Million Light-Years Away

Black holes are famous for ripping objects apart, including stars. But now, astronomers have uncovered a black hole that may have sparked the births of stars over a mind-boggling distance, and across multiple galaxies. via NASA https://ift.tt/2rrDlUR