Take note, DNA and RNA: it's not all about you. Life on Earth
may have begun with a splash of TNA – a different kind of
genetic material altogether. Because RNA can do many things at
once, those studying the origins of life have long thought that
it was the first genetic material. But the discovery that a
chemical relative called TNA can perform one of RNA's defining
functions calls this into question. Instead, the very first
forms of life may have used a mix of genetic materials. RNA,
DNA… TNA Today, most life bar some viruses uses DNA to store
information, and RNA to execute the instructions encoded by that
DNA. However, many biologists think that the earliest forms of
life used RNA for everything, with little or no help from DNA. A
key piece of evidence for this "RNA world" hypothesis is that
RNA is a jack of all trades. It can both store genetic
information and act as an enzyme, seemingly making it the ideal
molecule to start life from scratch. Now it seems TNA might have
been just as capable, although it