The Geographer Cone Snail, a beautiful but deadly ocean predator, uses a potent neurotoxic venom delivered via a harpoon-like tooth to paralyze prey instantly. While its sting can be fatal to humans, ...

If you’ve ever searched for ways to practice coding or prep for tech interviews, you’ve probably seen LeetCode mentioned everywhere. But in 2025, is LeetCode free, or do you have to pay to get ...