How long it took to develop 13 vaccines in history

Tech Insider
Coronavirus vaccine
A pharmacist prepares the Pfizer-BioNTech vaccine.

Jessica Hill/AP Photo

Photos show how cats see the world compared to humans

Tech Insider
A cat is seen in the hotel which offers various services such as personal care and accommodation for cats and dogs in Erbil, Iraq on October 18, 2022.
The biggest difference between human vision and cat vision is in the retina, a layer of tissue at the back of the eye that contains cells called photoreceptors.

Ahsan Mohammed Ahmed/Anadolu Agency via Getty Images

25 of the most mind-boggling natural phenomena on Earth

Tech Insider
Colorful pools are seen spotting the surface of the earth at the spotted lake in Canada
The spotted lake in Canada

iStock / Getty Images Plus

How Nancy Pelosi went from San Francisco housewife to the most powerful woman in US politics

Tech Insider : Politics
House Speaker Nancy Pelosi, Democrat from California..
House Speaker Nancy Pelosi.

Kent Nishimura / Los Angeles Times via Getty Images

Trump's 2024 GOP challengers: who's in, who's out, and who's waiting in the wings

Tech Insider : Politics
Former President Donald Trump arrives to speak during an event at his Mar-a-Lago home on November 15, 2022, in Palm Beach, Florida. Trump announced that he was seeking another term in office and officially launched his 2024 presidential campaign.
Former President Donald Trump arrives to speak during an event at Mar-a-Lago on November 15, 2022 in Palm Beach, Florida.

Joe Raedle/Getty Images

The Ukraine war rages on without a clear end in sight. Here are 6 ways the conflict with Russia could play out

Tech Insider
A Ukrainian flag waves in the village of Dolyna in Donetsk Oblast, Ukraine after the withdrawal of Russian troops on September 24, 2022.
A Ukrainian flag waves in the village of Dolyna in Donetsk Oblast, Ukraine after the withdrawal of Russian troops on September 24, 2022.

Metin Aktas/Getty Images

Putin's KGB past is key to grasping what he might do next in his failing Ukraine war, ex-spies say

Tech Insider : Politics
Russian President Vladimir Putin
Russian President Vladimir Putin meets with the Investigative Committee head Alexander Bastrykin in Saint Petersburg on October 9, 2022.

Gavriil Grigorov/Getty Images

How Sergei Shoigu went from Putin's wilderness bestie to the scapegoat for Russia's failures in Ukraine

Tech Insider
shoigu putin wild
Russian President Vladimir Putin (L) shows mushrooms to Defense Minister Sergei Shoigu during his vacation in the remote Tuva region in southern Siberia, in August 2017.

Alexey Nikolsky/Sputnik/AFP via Getty Images

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