English Conversations 2

  Scientists based in Japan have successfully 3D printed a hunk of wagyu beef complete with marbling Scientists based in Japan's Osaka University have found a way to  3D print wagyu beef in a lab  — a step they believe will one day help make widely available and sustainably-produced cuts of cultured meat that closely resemble original products.  Using stem cells that they took from  wagyu cows , the scientists set out to create a structure with the  characteristic marbling (or sashi) seen in wagyu beef  that sets it apart from other cuts of beef. By isolating beef cells, the scientists organized how the muscles, blood vessels, and fat should be stacked. The researchers then shaped these tissues into the form of a steak using a technique called  3D bioprinting , where cell structures can be layered to resemble real tissues in living things. The researchers believe that proving that a wagyu steak can be accurately 3D-printed could be a...

Cryptocurrencies let you buy goods and services, or trade them for profit. Here's more about what cryptocurrency is, how to buy it and how to protect yourself. James Royal, Ph.D. ,  Kevin Voigt Dec 3, 2021 A cryptocurrency (or “crypto”) is a digital currency that can be used to buy goods and services, but uses an online ledger with strong cryptography to secure online transactions. Much of the interest in these unregulated currencies is to trade for profit, with speculators at times driving prices skyward. The most popular cryptocurrency, bitcoin, has had volatile price moves this year, reaching nearly $65,000 in April before losing nearly half its value in May. By fall, the price had risen rapidly again: it hit an all-time high above $66,000 before falling back. 1. What is cryptocurrency? Cryptocurrency is a form of payment that can be exchanged online for goods and services. Many companies have issued their own currencies, often called tokens, and these can be traded specifically...