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In this photo provided by researcher Rui F. Oliveira, a zebrafish, bottom, is monitored to see its reaction to a video of another at a laboratory in Oeiras, Portugal in March 2023. A study published on Thursday, March 23, 2023, in the journal Science shows that a relaxed fish can detect fear in other fish, and then become afraid itself – and that this ability is regulated by oxytocin, the same brain chemical that underlies the capacity for empathy in humans. (Rui F. Oliveira via AP)

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A fish can sense another's fear, a study shows
By CHRISTINA LARSON - AP Science Writer
Thu,03/23/23-2:10PM , 170 Reads
WASHINGTON (AP) — Our capacity to care about others may have very, very ancient origins, a new study suggests.
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This photo taken on Thursday, June 16, 2011 shows four Przewalski's Horses after being released at the Khomiin Tal reservation in Western Mongolia. Archaeologists have identified the earliest direct evidence for horseback riding – an innovation that would transform human history – in 5,000 year old skeletons in central Europe. (AP Photo/Petr David Josek, File)

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First evidence for horseback riding dates back 5,000 years
By CHRISTINA LARSON - AP Science Writer
Fri,03/03/23-1:00PM , 310 Reads
WASHINGTON (AP) — Archaeologists have found the earliest direct evidence for horseback riding – an innovation that would transform history – in 5,000 year old human skeletons in central Europe.
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CORRECTS DAY TO THURSDAY - FILE - A humpback whale breaches off the coast of Port Stephens, Australia, on June 14, 2021. Lonely humpback whales are more likely to sing – but as populations grow, whales wail less, a new study released on Thursday, Feb. 16, 2023, suggests. (AP Photo/Mark Baker, File)

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Lonely tunes: Humpback whales wail less as population grows
By CHRISTINA LARSON - AP Science Writer
Thu,02/16/23-10:57AM , 172 Reads
WASHINGTON (AP) — Those melancholy tunes sung by humpback whales may really be a sign of loneliness.

Scientists who tracked humpback whales in Australia noticed that fewer whales wailed to find mates as their population grew.
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A golden lion tamarin sits in a tree in the Atlantic Forest region of Silva Jardim, Rio de Janeiro state, Brazil, Friday, July 8, 2022. A campaign to vaccinate these endangered monkeys in Brazil against yellow fever may help save them from extinction. (AP Photo/Bruna Prado)

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Race to vaccinate rare wild monkeys gives hope for survival
By CHRISTINA LARSON - AP Science Writer
Tue,01/31/23-5:36PM , 193 Reads
SILVA JARDIM, Brazil (AP) — In a small lab nestled in Brazil’s Atlantic Forest, researchers with gloved hands and masked faces cradle four tiny golden monkeys so a veterinarian can delicately slide a needle under the thin skin of each sedated animal’s belly.
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