Flight was once the cutting edge of adventure and invention. Early women pilots, such as Amelia Earhart and Bessie Coleman, were seen as death-defying daredevils and—to many people—heroes. In modern times, flying across the country has become much safer, and even routine. Though male commercial pilots still outnumber their female peers, passengers no longer think twice when a woman's voice announces, "This is your captain speaking."

Even space exploration is becoming accessible to the masses, by way of the internet. In 2013, astronaut Karen Nyberg sent a YouTube video from the ISS, demonstrating how to wash your hair in zero gravity with a bag of warm water and no-rinse shampoo. In the video, Nyberg's long, blond hair stood straight up, and she caught water droplets that floated away from her head.

However, there are still new horizons to cross, and new technology to advance. Alexandra Loubeau, a NASA aerospace engineer, is researching how to lower the noise a plane makes when it breaks the sound barrier. This sound is called a "sonic boom," and can hurt people's ears and frighten animals. Loubeau is trying to reduce this noise, so that commercial airplanes can fly at supersonic speeds without causing a disturbance.

Women are also helping plan humanity's first manned trip to Mars. A non-profit organization called Mars One is aiming to send people on a one-way mission to the red planet.

Suzanne Flinkenflogel is Mars One's director of communications. Flinkenflogel, who worked in both Spain and Mexico before joining Netherlands-based Mars One, encourages people around the world to apply for the program. According to a 2014 Huffingtonpost.com article, 472 women have already advanced past Mars One's first selection round for the mission to Mars.

Though no one is heading to Mars right now (Mars One's current timeline has the first mission launching in 2024), there is no saying how far women may one day travel. For scientists, explorers and thrill-seekers, not even the sky is the limit.