New evidence could help explain how some massive black holes shut down a galaxy’s ability to make new stars. Astronomers say jets of “radio-frequency feedback” streaming from mature galaxies’ central black holes are the “off switch,” preventing hot free gas from cooling and collapsing into baby stars. “When you look into the past history of the universe, you see these galaxies building stars,” says Tobias Marriage, assistant professor of physics and astronomy at Johns Hopkins University.
Oobleck, named for a gooey substance that fell from the sky in a Dr. Seuss story and ubiquitous at elementary school science fairs, is just a thick solution of cornstarch in water. But it’s not as simple as it sounds. It’s a “non-Newtonian” fluid that doesn’t respond to outside forces the way you’d expect. The harder you stir it, the thicker it gets and the more it resists your stirring. Hit it hard enough, say with a hammer, and it instantly hardens enough to shatter.
It may just be that more than any other industry, LBM is one that sees the highest rate of family succession—Dads passing lumberyards along to sons and daughters, who wait for decades to do the same for their own children. Dave Reichert left his position as a partner in a law firm to purchase Davis-Hawn Lumber in Dallas. The career move has allowed Reichert to grow the business as well as spend more time with his family.
Muck Rack makes it simple to find people, tweets, or articles that mention any name, keyword, company, hashtag etc. We've compiled this guide to help you make the most of your search.
Selecting a term
Start searching tweets, articles from media outlets, articles mentioned in tweets, journalists'
names, titles and bios with some suggested searches:
Companies or Topics (e.g. iPhone, Microsoft)
Phrases (e.g. "cloud computing") — use quotes to keep the terms together
Twitter handles (e.g. @username) — returns those who have mentioned or replied to
Names (e.g. "David Pogue")
Hashtags (e.g. #sxsw, #london2012)
Bio details (e.g. vegan, Olympics, father)
Muck Rack's Advanced Search allows for many boolean operators.
Find results that mention multiple specified terms, use AND or
+. For example, ensure each result contains both Elon Musk and Mark Zuckerberg by
searching Obama AND Romney or Obama + Romney.
Use the operators OR or , to broaden your search when you'd like either of
multiple terms to appear in results. (This is the default behavior of our search when no operators
are used.) For example, search for democrat OR republican to find results that refer to
Democrats and/or Republicans.
Use NOT or - to subtract results from your search. For
example, searching Disney will yield results about the Walt Disney Company as well as Walt Disney
World Resort. To exclude mentions of Disney World, search for Disney -World or Disney
When using one of these operators with a phrase, enclose it in quotation marks. For example, you can
find results about smartphones excluding Apple's iPhone 4S by searching smartphone -"iPhone
Exact case matching or punctuation
If you're searching for a brand name or keyword that relies on specific punctuation marks or capitalization, you can
find results that match your exact query by adding matchcase: before the keyword you're searching for, like matchcase:E*TRADE .
Use parentheses to separate multiple
boolean phrases. For example, to find journalists talking about having fun in Disney World or
Disneyland, search for ("disney world" OR disneyland) AND fun.
An asterisk can be used to search for any variation of a root word truncated by the asterisk. For example, searching for admin* will return results for administrator, administration, administer, administered, etc.
A near operator is an AND operator where you can control the distance between the words. You can vary the distance the near operation uses by adding a forward slash and number (between 0-99) such as strawberries NEAR/10 "whipped cream", which means the strawberries must exist within 10 words of "whipped cream".