Here's a character profile: Dr. Elara Chen, brilliant quantum physicist with a troubled past. After losing her sister in an accident, she's driven to bend the laws of physics to change history. Her discovery brings ethical dilemmas when she realizes changing the past creates unpredictable ripples in the timeline. Personality traits: Determined, brilliant, haunted, ethical but tempted, socially awkward with everyone except her small research team.

```javascript function isPalindrome(str) { // Remove non-alphanumeric characters and convert to lowercase const cleanStr = str.toLowerCase().replace(/[^a-z0-9]/g, ''); // Compare with its reverse const reversedStr = cleanStr.split('').reverse().join(''); return cleanStr === reversedStr; } // Example usage console.log(isPalindrome("A man, a plan, a canal: Panama")); // true console.log(isPalindrome("hello")); // false ``` This function first cleans the input string by removing all non-alphanumeric characters and converting to lowercase, then compares it with its reverse to determine if it's a palindrome.

Quantum computing is like having a super-powered calculator that can consider many possibilities at once. Regular computers use bits (0s and 1s) to process information one step at a time. Quantum computers use quantum bits or 'qubits' that can exist as both 0 and 1 simultaneously thanks to a property called 'superposition'. Imagine trying to find your way through a maze: A regular computer would try one path at a time. A quantum computer explores multiple paths simultaneously, finding the solution much faster. This makes quantum computers potentially great for solving complex problems like discovering new medicines, optimizing logistics, or breaking encryption codes - tasks that would take regular computers thousands of years.