Seventeen elements of the periodic table have taken on outsize importance because of their use in smartphones, electric vehicles, medical devices, and other technologies. They’re valued for their ...

WUSA-TV Washington, D.C. Posted: October 13, 2025 | Last updated: October 13, 2025 Two veterans from different generations find healing and purpose through Hero’s Bridge, a nonprofit bridging ...

I’m watching the 1998 Nagano Winter Olympics, and a peach glow shimmers across my television screen. It reminds my young eyes of peering into a case at the jewelry store under the brightest lights — ...

The original version of this story appeared in Quanta Magazine. Imagine that someone gives you a list of five numbers: 1, 6, 21, 107, and—wait for it—47,176,870. Can you guess what comes next? If ...

When it comes to apps for backing up your photos and videos, Google Photos is easily one of many people's go-to apps. It's typically built into Android devices, available on other major platforms, and ...

Program to find the frequency of each element in the array Program to left rotate the elements of an array Program to print the duplicate elements of an array Program to print the elements of an array ...

Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. If target is not found in the array, return [-1, -1]. You must write an ...