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| Astronomers agree: Universe is nearly 14 billion years old Posted: 04 Jan 2021 10:19 AM PST From an observatory high above Chile's Atacama Desert, astronomers have taken a new look at the oldest light in the universe. Their observations, plus a bit of cosmic geometry, suggest that the universe is 13.77 billion years old - give or take 40 million years. |
| Under Antarctica's ice, Weddell seals produce ultrasonic vocalizations Posted: 21 Dec 2020 10:41 AM PST Weddell seals are chirping, whistling and trilling under Antarctica's ice at sound frequencies that are inaudible to humans, according to biologists. Two years of recordings have captured nine types of tonal ultrasonic seal vocalizations that reach to 50 kilohertz. |
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