Space Signals & Earth’s Gold: Science News

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Article title: Science news of the week: Mysterious signals from space and parrots' understanding of language

Introduction:
This week in science news, researchers have been busy unraveling mysteries both on Earth and in the cosmos. From the discovery of ancient artifacts to strange signals from space, here's a roundup of the most fascinating stories.

Article Body:

   Ancient human history:
       A 43,000-year-old human fingerprint was found.   2.2 million-year-old tooth enamel revealed secrets of human relatives.
       500-year-old artifacts, possibly used in fertility rituals, were discovered in a Mexican cave.
       Ancient DNA provided clues about the rise and fall of the Maya civilization.
       A "ghost" lineage from ancient China was identified from a 7,100-year-old skeleton.
   Strange signals from space:
       A mysterious space object, ASKAP J1832-0911, emits pulses of radio waves and X-rays every 44 minutes.
       This is unlike customary pulsars, which emit signals every few seconds or milliseconds.
       The discovery could reveal previously unknown physics.
       Related stories:
           James Webb telescope discovered the farthest known galaxy.   NASA plans to build a radio telescope on the dark side of the moon.
           The James Webb telescope uncovered a new kind of hidden black hole.
   Life's little mysteries:
       Parrots communicate through squeaks, squawks, and whistles.
       They use "signature contact calls" to refer to one another.
       In captivity, they pick up human speech, but it's unclear if they understand what they're saying or are just mimicking.
   earth's core 'leaking' gold:
       Earth's core contains a vast reservoir of gold and precious metals.
       Scientists found signs of ruthenium in volcanic rocks in Hawaii.
       This metal may have come from the Earth's core-mantle boundary.

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